CAPTCHA: I can't check a box that doesn't exist I spent several hours yesterday thoroughly researching a question, to be told it looked like spam, at which point I pared it down and posted it. Then I realized I posted it on the wrong SE network site (I had initially written it for AskUbuntu, but realized it fit better on ServerFault), so I went and deleted it after a few minutes, so I could post it on ServerFault, so I would have to wait before I could post it. I came back this morning, and after all this, the website said I looked like a robot, which is honestly understandable, given my behavior, but I really do need an answer to my question.  The problem is, I can't check the nonexistent box. Other people with the same issue had solved it by going on incognito mode, which didn't work for me. Eventually I figured out that SE is maybe probably using Google CAPTCHA, which just doesn't work in China where I am. I fired up my VPN, but still failed to connect. I thought the browser cache might be an issue, so I reloaded that. And I still can't get the checkbox to show up.    If this is a result of being in China, I'd like to make a feature request that allows for an option of using non-Google CAPTCHA. If such an option exists, I'd like to know how to use it. I will make such a feature request in a different post if it turns out I'm not just missing something.  It's also conceivable that IP addresses from China are more likely to be picked up by the spam filter, which is just unfortunate for me, I guess. I really need to get my work done though, and I've exhausted all other avenues I can think of.
Please revisit the CAPTCHA & China issue Back in 2012 when China first blocked all Google services, thereby preventing non-VPN users from proving their non-roboticness, someone quickly opened this thread on Meta:    The consensus at the time was "we can't think of a better way of doing things".  Well, 3 years have passed and China is showing no signs of unbanning Google. Meanwhile, CAPTCHA technology has evolved. Can the SE admins please revisit this situation? People in China without a VPN are completely unable to prove they are not bots. I couldn't even search for the phrase "pgp" on Security.SE without hitting the human verification barrier. Blocking questions is one thing, but searches also? I think that's too strict.  (yes, I wrote this with my VPN)
Exporting symbols rather than points in .dxf I have a map I've made in QGIS which is points from a .csv file. These have then be turned into different symbols based on what they represent and then the sizes of said symbols based on values in the .csv.  I need to export this as a .dxf to use in AutoCAD so it basically looks the same as it does in QGIS. However, when I do so it just exports as single dots (points). Is there a way I can export them as the symbols as I can see in QGIS? Showing $(a^{2}+2)(b^{2}+2)(c^{2}+2)\geq 9(ab+bc+ca)$ series of young adult science fiction books from early 1980s about last of a race of martial experts that sees the destruction of his home planet What does the word "it" mean? Even if determinism isn't true for everything that happens—even if   some things just happen without being determined by causes that were   there in advance—it would still be very significant if everything we   did were determined before we did it. However free you might feel when   choosing      [Thomas Nagel - What does it all mean? p.52]   What does the word "it" mean? A Riemann integrable function must have infinitely many points of continuity I have 12.10 ubuntu and when I try to remove / install programs I get notification :      Software can't be installed or removed because the authentication service is not available.    (org.freedesktop.PolicyKit.Error.Failed: ('system-bus-name', {'name':  ':1.104'}): org.debian.apt.install-or-remove-packages   When I log in as root user (instead of user account that I regulary use) i have no problems. I am having a problem with Windows 7. When I boot up, the CPU jumps to 100% execution for about 10-15 minutes. During this time, it is really slow, and if I play any music, the songs play slowly and sound distorted.  I tried to scan my computer with different antivirus programs, I used Spybot, HijackThis, and CCleaner, but I didn’t find anything of note.  I watched the process list in Task Manager and saw that there are two processes that are to blame. There are two copies of svchost.exe, one using ~48% CPU, the second (under the Network Service account) using ~37%. For the first 15 minutes, the CPU runs at about 70-80%, then eventually drops to 30-40%.  I don’t know what to do. I could not find a way to stop the services, and if I try to kill them, sometimes the system crashes. Simple form validation How does one attack a two-time pad (i.e. one time pad with key reuse)? My question might appear the same as the question , but actually I did read all the answers and none of them helped me with the details I need.  I am new to cryptography and my problem is with two time pad attacks on OTP. The problem I had in my course was that I have 10 ciphertexts encrypted with the same key $K$. I am then given another ciphertext that I should decrypt.  I know that XOR-ing two ciphers gives me the XOR of their original messages.  My question is what is the correct thing to do after that?  I tried to take 3 ciphertexts $C_1, C_2$ and $C_3$.  Then get $S_1 = C_1 \oplus C_2  \oplus $' ', also get $S_2 = C_1 \oplus C_3 \oplus$ ' '.  After that I compared all corresponding characters in $S_1$ and $S_2$,  and if $S_1[i] = S_2[i]$ then I calculate $S_1[i] \oplus C_2[i]$ to get $K[i]$.  I tried this on paper before coding and it worked, but I might be missing something.  Is this the right approach? Why does it work? When should I use the "strictfp" keyword in java? I've looked up what this does, but does anyone actually have an example of when you would use the strictfp keyword in Java? Has anyone actually found a use for this?  Would there be any side-effects of just putting it on all my floating point operations? After the upgrade I can't figure out how the new shield system works. I have the option to discard the shield, and I notice I have a new potion in the inventory.  More importantly, I got attacked (and lost) twice in a short amount of time and don't have a shield. When do you now get shield? How do I install Skype? Setting git default flags on commands Selecting features by attributes using ogr2ogr? Why a backslash displays as "W"+strikethrough in Netbeans? I'm facing a strange problem with Netbeans. In the editor, when I type a backslash(), I see a W with a strikethrough (as shown in the attached image).  So the c:\\abc is displaying as:    But, when I copy and paste that string into notepad, it gets pasted normally (i.e. c:\\abc).  Has anyone faced this problem before? How to fix it? Hi im new to Blender and i want to know when im in edit mode if i can copy or cut a selections of polygons faces and paste to another mesh.  Thanks in advance for any help Let $S$ be a finite collection of real numbers (not necessarily distinct). If any element of $S$ is removed then the remaining real numbers can be divided into two collections with same size and same sum ; then is it true that all elements of $S$ are equal ?  (I know the result is true if the &quot;reals&quot; are replaced by &quot;integers&quot;.) Salesforce Toolkit for .Net with silverlight 5 I am creating a application with Silverlight 5 in which I have to communicate with Salesforce APIs.  Currently I used Salesforce toolkit for .net (version 1.2.1) by I am gettting error after using authentication method as -     The base class or interface 'System.Object' in assembly   'System.Runtime, Version=4.0.0.0, Culture=neutral,   PublicKeyToken=b03f5f7f11d50a3a' referenced by type   'Salesforce.Common.AuthenticationClient' could not be resolved.   System.runtime dll is referenced my application.   And Latest version of toolkit is even not installing in application. There is some compatibility issue with silverlight 5.  As per github and blogs Salesforce Toolkit is compatible with Silverlight 5. I installed it using nuget package manager.  Any idea to fix this ?  Thanks, Is GTA Online cross-platform? Grand Theft Auto Online exists on five different platforms: XBox 360, PS3, XBox One, PS4, and PC. Do any of these play on the same servers, allowing people on differing platforms to play together? I want to extrude a curve in two directions.    Or join both curves into one, is it possible? I've tried copying it and then join segments, but I don't see Remove Doubles option while working with curves.