I just noticed that addition.   Searching for posts by author does not need the brackets [], and can be clearer as to what "1234" is. A new user may think 1234 is a username example. Tag guideline can be clearer, for example: [tag-name].
121913
There's a new popup helping you with searching, but one of the hints is wrong:    Searching for  will return answers as well as questions, and it's not the number of (up/down)votes which counts, it's the score. Better would be "posts with a score of 3 or higher" or "questions and answers with a score of 3 or higher".
71814
I just noticed . Its author doesn't have an account on this site, which makes it show up like this on the homepage:        It looks like a simple thing - but it gets in the way of the 'flow' of the page:        Couldn't we somehow get the author's name, so that migrated questions with authors that don't have an account here still show up, like this:        Much better. Please?
114730
On every use profile page the search bar on the top of the page already contains user:&lt;id&gt; text to simplify search for post of the currently visible user. But this doesn’t work correctly for the  user:        Instead of searching for posts owned by Community user I’ve got Jeff Atwood posts:        In this case minus sign was just ignored and instead of (-1, i.e. Community user), the (+1, i.e. Jeff Atwood) is used. Same happened for any other negative id for the “user:” option in the search box.
1514
On the main site, you can (for example) ignore tags using this notation [tag:foo*], which will ignore stuff tagged as  but also .  The nice markdown highlighter for tags seems to have a problem with asterisks, though -- as you can see in this post.  I would have expected them to be highlighted the same way as they are on the front page.
14475
Click on the tag "ruby-on-rails" from a job or just go to  and you'll see a lot of jobs (969 for me right now), a lot of them not containing the tag. I think that the results are actually just the search result for the "Ruby on Rails" string, using OR.
56395
I just received the following in my Response pane (from ), but you can see it was meant for another user.  The @Robert line seems to have found 'Robert' in my name first, instead of Robert C. Cartaino.  I think the comment notification feature should match based on the closest match from the first character in a name (in posting order), and not just the first match found in posting order.
18413
that I posted on Meta.Programmers was rather broken, with a block quote replaced by apparently random letters and numbers. Aarthi fixed it with a non-breaking space, but I don't understand what went wrong.  When I opened the post for editing, the displayed text was what I intended to go there. It only happens when the post is viewed in the reading mode. The preview also displayed the text correctly.
120326
Currently, search seems to be doing odd things when you search for posts without certain tag(s) using the not operator. For example:  -[css] -[html] should return a list of posts that do not have the CSS or HTML tags, and it correctly looks for that criteria. However, it also seems to change my search query to "-[css] -[html]" (note the quotation marks) and searches for posts  which do not have the CSS and HTML tags, but also contain the words CSS and HTML within them.        The same thing happens whether you search for one or many tags. This doesn't seem to happen if you don't use the not operator on the tags.
44844
Can someone please explain in a clear and concise way how am I supposed to enter the names of authors in a BibTeX file? I have entries with something like   @article{someid,    author = {Juan A. Navarro P\'erez, Ra\'ul de la Garza and Andr\'es Espinoza},    ...   but somehow the output seems kind of wrong!
95809
When doing a search, posts with MathJax code are wrongly formatted.  In this example  all the results look ugly. When taking a closer look at the first post, I notice that the first $ is not regocnized by MathJax as a math-begin, while the second $ (that should denote math-end) is taken as the beginning of math.    Another example:
67092
When you click on someone's profile tags, it shows a search of posts by that user on the selected tag. However, the tag description appears twice in the page and there's not much left for the actual content you want to see.      The image was taken from my profile. Also not sure why it shows me a user id instead of my username.
20904
Here's something interesting I noticed today - it is not possible to name a post a number - no matter what theme you use, and even if you name a post a long number that has no tag or post-name or category name conflicts, you will still get 2015 or 1826628 renamed as 2015-2 or 1826628-2.  I assume this isn't a bug, but I also don't see why you can't have mysite.com/20 or similar as a permalink to a post, when you have it named "20", and permalinks are set to postname.
63327
Just searched for '1955211' in the SO search field.  Expected output: include the question/answer with ID '1955211' in the search results. If the search result set is a single question/answer, redirect to that (I seem to remember, that is already the case).  Actual output: the 'no results' page showed up.  How to fix: If the search term is /^[0-9]+$/ (or whatever a valid question/answer ID is), look up the ID database and include results with the queried ID.  Complicacies: May provide results that are not (at first sight) correlated to the search query, e.g., when searching for 127001 or 123456.  Problems steming from complicacies: If someone can't distinguish between the different result types, he should perhaps re-consider giving answers on SO.
86274
Here's a scenario:  Someone asked about "How to build a SQL query to get count and blah blah blah..."  His only tag is . I added the  and  tags to it.  Someone else answered with a nice SQL statement that has a "group by" statement which seems "logically inevitable".  I proceed to add a tag . I did that on the basis that someone who searches for  will be able to find this post useful, just as I did. My concern is, it wasn't described at all in the question, nor was it implied, unlike  and .  What is the community opinion?  The scenario above is a real one . And the one who answered it nicely is Jon Skeet.
76370
I wanted to look for some questions to answer, so I went to . It came up with some really weird tags, as seen in this image:        , , , , and  are the tags in which I have the most posts. I also have  that has the tags , , and .  When I clicked on |bug|reputation|achievements-dialog|:        After I gave myself a favorite tag it acted as normal filtering the unanswered questions by that tag.
35937
I just joined Sports, and I decided to take a look on Sports Meta. I clicked on my profile there. This is part of what I saw:     Yet the profile shouldn't indicate that it is, in theory. . .  This seems to be a bug.
109819
Over on , I have just tried to create a tag synonym of  for &dagger; since there seems to be some confusion as to which to use, and people end up adding both.  &dagger; Although looking at the tag synonyms of  here, I should probably have done it the other way around.  Instead of just creating the synonym as I expected, it showed me  (which obviously I couldn't vote on myself) as if I were not a moderator. I guess I should have noticed that the button said "Suggest" rather than "Create", but elsewhere on the site, diamond moderator 'suggestions' are rather more binding. *8')  It was then suggested that I needed to do this via the moderation tools, so I had a hunt around and managed to find the moderator tool for tag synonyms and approve my own synonym from there. I now see however that just clicking on the  link would have taken me there anyway.  It seems odd that we can't just create the tag synonym directly from the tag synonym page, and the suggestion mechanism breaks the expectation of moderator suggestions being immediately binding (like flags), so it would be nice if this behaviour could be made more consistent.   Incidentally, I fully expect this to be , and rightly so since it only saves one click, but at least this post will serve as a searchable answer for future diamond moderators who are confused about this. *8')