That's odd, does it happen on every single post by me, or just the recent ones where my name is in red? (Look up some old posts by me if you can.)

Does it happen on PaulH's posts (his name is also in red)?

See if you can send me a screen shot of it happening (with some of the preceding table if possible) and maybe a saved-to-disk copy of the raw HTML as it came into your browser.

I think that it's got to be a new UBBThreads bug with rendering in Opera, something to do with tables, but we can't be sure until we look at it more closely.