Hi,
I looked at some of your old posts and saw that the corruption problem is ongoing.
I saw a link to your store http://stores.ebay.co.uk/OLD-C...AZINES-and-BROCHURES and checked the first listing I could click. I immediately spotted that the code is incompatible due to being copied from Microsoft Office / Word, which uses a different mark-up language than HTML. There is a button to paste code from Word on the toolbar. It (hopefully) strips the bad code, leaving the text.
Hope that helps.
Danno