I have already earned 11 hats--10 on Stack Overflow and one here on meta.stackexchange.  But I still haven't got The Milliner hat, which says "collect 11 hats". Is it required to get all of them on one site?
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Today I got my 11th hat but I have not received the hat 011, whose requirement is to get 11 hats, I found it a bit strange since it has been a few hours since I got the 11th and I have not been given.  Are there any extra requirements for this hat? Or is it a bug? Or all the hats have to get them in the same place?
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This is the first year I've done the whole "winter bash" thing, and I was interested; how did this tradition start? Mainly, who (and why, and how) invented the idea of hats on avatars (on SE and subdomains)?? It seems like a cool idea, but it seems like the weirdest thing ever. Any clarification is appreciated!
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There are already many questions about the epic badge and that it was assigned too late, but:  I have just received the  on  after earning 200 rep today (which incl. 2x15 for two accepted answers). However the rep listing under  states for me:  rep cap was reached via rep from upvotes *only* on 41 days rep cap was exceeded on 48 days   I had been keeping an eye on those numbers so the badge came as a surprise. Is this an error? I'd really like to earn the badge ;-).  Also just to clarify: Must the rep cap be hit, i.e. must a limitation have been encountered? By this I mean you got 21 up-votes at one day (20 to get the max 200 rep + 1 to hit the limitation, which is than listed as [0] in the listing). Or is it enough to get 200 (or 200+) rep points in any combination? My listing tells me that both of these values are below 50 times. I've tried hitting the recalculate button, with no change.    Ok, I manually recounted all days where I got 200 or more rep. I actually count 50 of them, however on one I had exactly 200 which might not count for the rep cap was exceeded on number while counting for the badge. This makes 49 days. I thought the last missing one might simply be because the day isn't over, but now it is 5 min after midnight UTC and it is still just 48.    The same -2 offset happened now to me with the Legendary badge:  rep cap was reached via rep from upvotes *only* on 111 days earned at least 200 reputation on 148 days   I don't mind it at this point, but in general there should be an exact display of the days available.
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Is there any concern that , due to their time-limited nature, will encourage mass spamming of posts? Cosmopolitan, for example, can only be achieved by posting to Meta. There are over one million users on Stack Overflow who may want this hat, and have only until January 4th to get it, and their only means of doing so is to invent some reason to post to Meta.
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Normally the hat picker is on top of the "Badges" box in your activity tab, but when there's a "Congratulations" there, the hat picker appears behind it:    Also, as @MikeMiller mentions, the hat disappears after you click "let us pick".
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When I loaded the review page (in Stack Overflow, though I have no specific reason to think it is related) I got a weird hat in the upper left hand corner.    See the hat in the upper left hand corner?  That's belonging to user # .  His profile page also has the hat in a ... weird ... location, but not this weird.    I'm guessing this is due to the not-loaded image for the avatar (adblock blocks Facebook avatars for me often)?  It also causes the toolbar notification to show his link unless I'm hovering over something else.  It also changes the location of the gray box to the upper left hand corner when I hover over the hat (and hovering over the white box does nothing).  It's definitely him (or any not-loaded avatar perhaps), once he fell off the last 6 reviewers it stopped appearing.
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I have 101 rep on  and am not suspended there. But the site switcher thinks I only have 1 rep there:     I noticed this after I .   To test this, I just added Expats and Reverse Engineering to my site switcher list. On both of those sites I have 101 rep and am not suspended. Results:    Huh?
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I just received my first  Secret Hat, so I decided to start the traditional Secret Hats and how to get them spoiler question.    Note: Please edit the primary list of secret hats with definitive answers only. If you'd like to discuss the hats further and/or work towards identifying what their triggers are, please do so in chat as the comments here are not meant for extended conversations about them.
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So, recently, perhaps out of sheer boredom, I have decided to go around and collect scores of > 200 on different SE websites. Some I have gotten reputation through answers, some through questions, and, in the case of skeptics, I got the last 20 points for editing out people's mistakes (because I'm just not that skeptical).  This does leave me wondering though, how many of these sites will give me icons on my flair?    And now, your obligatory .
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I thought that they represented the rank of the person by the number of hats they have collected. The numbers &quot;jump&quot; however, they do not follow an unbroken order:  There are also really big gaps:  What do these number mean? Are they supposed to be like this?
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So far, I've unlocked one of the secret hats. I'm wondering what other secret hats are out there and how to earn them?
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I was wondering if the hats that I gained during this period will remain or I have them only during Christmas.  If it has an end, when does Winter Bash and hats period ends?
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After finding , I thought about inspecting Community's ♦ profiles. What did I notice? Community ♦ have more than 1 rep on some meta sites.    - 5 rep  - 3 rep  - 3 rep  - 3 rep   Why is it?
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I've searched all over meta and found  for wearing multiple hats that was . But today I saw  profile.     Is there really a way to wear two hats or is this something out the ordinary?
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The hat's description says     answer a question qualifying for the Tumbleweed badge that gets accepted   During the winter bash, I  a question that is a , and it got accepted; yet I did not get the hat. However  answer  and did get the hat. (What was the difference?)  So what are the exact requirements to get the  hat?
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I have just seen the hat known as  for the first time. Does anyone have any information (or hints if you don't want to spoil it) on this mysterious hat!?!?  Here are the given (but not so useful) clues:     The hat in action:    UPDATE: Shog9 states that the beard is possible but very difficult to obtain. However based on , Aarthi said that they have an internal difficulty that they are ordered by and yet the beard is not placed anywhere near first. This does not add up.  UPDATE 2: The beard is not located in  or    UPDATE 3: FYI, the user  has the beard.
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When going on the "/badges" page on a StackExchange website.  All you are presented with a tick next to badges you have achieved.    In my opinion is perfect for badges that can only be achieved once, but for those you can unlock more than once, e.g. Enlightened.    Instead of just showing a tick on these types of badges, instead show a number in the green circle (or whatever design is applicable for the website).  I understand that this could cause problems if say the badge was earned #### times.  In this case it could just show a +.  Then if the number was shown on mouse-over it could say ("Earned badge 1643 times.")  Leaving the UI nice and compact.