I just before posted an issue with a stack trace. Unfortunately the newlines were skipped so it is hard to read the post. I used Opera on XP. My workaround was to manually insert empty lines.

Submitted by Otto Hausbacher on 12 August 2010 at 13:31

Skipping newlines is a feature of the used wiki text in issues. You can work around this feature by surrounding the stack trace in (xml) verbatim elements (as in: less than sign, verbatim, greater than sign). I will add an explanation to the issue editing on how to use the verbatim elements (posted as an issue earlier).