With nigthly builds from last couple of days, large lists of bugs in bugzilla render incorrectly. (for example look for m14 bugs, or m15 bugs etc). A mozilla.org image is shown many times, and some numbers (i guess it's some cookie information) is rendered also like 1234:1234:2345:3456 etc.. (This is on Linux, with Viewmanager2 enabled).
*** This bug has been marked as a duplicate of 29305 ***
verified dupe of bug that now works