In a comment to Henry's answer in a recent question I copied a link from Wikipedia directly from my browser window to the comments box. However, upon submitting the comment, the link was misinterpreted.
The original link was: http://en.wikipedia.org/wiki/Box–Muller_transform
After some experimentation, I believe the error is due to the en-dash in Box–Muller being stripped out (or not being converted to a regular dash).
When I tried copying the link to other browsers on my machine, there was no problem.
This occurred in Mac OS X (10.6.8) with Firefox 6.0.2, but I doubt the problem is specific to either of these.
I realize this question/comment is not specific to math.SE, but it seems relevant to alert people here as I suspect that some links to math articles might be more susceptible to the bug mentioned above.
Addendum: As Asaf's comment has so aptly demonstrated, the problem occurred while using the [title](link)
syntax in the comments. For example, I used:
[Box-Muller transform](http://en.wikipedia.org/wiki/Box–Muller_transform)
and this appears to have gotten translated upon comment submission to
[Box-Muller transform](http://en.wikipedia.org/wiki/BoxMuller_transform)
[title](link)
works just fine. For example: Box-Muller transform $\endgroup$[Box–Muller transform](http://en.wikipedia.org/wiki/Box%96Muller_transform)
gives Box–Muller transform. $\endgroup$