The problem is actually a bit more widespread but is connected to your issues.
On Firefox when listing similar (where a category change is needed) the drop down box doesn't work. Ok if you want to list similar using the same eBid categories but not when you need to change them.
On Chrome the drop down works but on preview it is providing the old: 'Err_blocked_by_xss_auditor' message
3rd time this has happened so presumably Gazza will be able to fix quite easily. Recent thread which also partially covers this glitch is:
https://www.ebid.net/forums/showthre...by_xss_auditor
Might help if someone from support is monitoring these pages...