http://bugs.winehq.org/show_bug.cgi?id=28578
--- Comment #5 from Rosanne DiMesio dimesio@earthlink.net 2013-07-26 08:30:22 CDT --- I am still encountering this in Firefox 21 & 22, and I tested in a clean profile (no extensions) on both openSUSE 12.3 and Linux Mint 15.
This can be tested on the Wiki Sand Box page. There's a preformatted section under Formatting that reads
preformatted some more and some more lines too
The line break is stripped out when I save the page, even if I have made no edits. Not only that, but everything on that page below IRC Log Test is also gone.
As for other browsers, Opera, Chrome, Chromium, and Konqueror all show raw text in the edit window when I try to edit any page, and trying to preview or save (even if I made no actual changes) from any of these browsers results in the same error message:
ExpatError: mismatched tag: line 389, column 1341 (see dump in /var/www/wine/wiki/data/expaterror.log)