Created attachment 733192 [details] Selection_040.png User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:19.0) Gecko/20100101 Firefox/19.0 Iceweasel/19.0 Build ID: 20130220104629 Steps to reproduce: LWN has an article http://lwn.net/Articles/545741/#Comments which is named "Schrödinger's
It looks like the bug report was truncated at the UTF-8 character. The problem is that, with a title with UTF-8 characters (in this case a cat), the title in the tab bar gets truncated without regards to the UTF-8 character boundries. You can see it by visiting the linked LWN page, but that's subscriber-only for the next week, so here is a page that shows the same problem: http://jim.sh/~jim/tmp/ff/857913.html As the tab size shrinks, you'll see invalid UTF-8 characters at some sizes.
confirming with Firefox20 and Firefox10ESR on windows7
Created attachment 739754 [details] Screenshot, Linux: Works when there is enough space Works on Linux Firefox 22, self-compiled, 64bit, Ubuntu 12.04 64bit
Of course it works when there's enough space -- we're talking about label truncation here, not normal display.