There are various threads on the topic.
It started with an update to enable eBid to handle foreign (i.e. non-English) characters in listing better - making the site more internationally compatible.
A side effect of this update was that some existing characters (e.g.: the copyright sign, pound sign, quotation marks, and others) no longer displayed properly - usually being preceded by an accented capital A.
eBid then ran a database wide routine to (supposedly) fix this problem within listings. Only problem was that they screwed up, and the 'fix' blew many listings apart if they contained those characters.
Since then, admin have not taken responsibility for the damage, seem unable to fix it, don't seem to have had a good backup they could roll back to, and avoid all mention of the problem unless tackled direct by an irate user. No announcement of the screw up has been made, nor any advice as to what users are supposed to do.
If you have your own backup of your listings as they existed before (I think) 25th October, then you can overwrite any damaged listings. Listings created after the 'fix' should be OK.
Note the above date. This issue should have been tackled immediately, as any backup users may have will now likely be out of date (or backups of damaged listings). A situation that worsens as more time passes.