Text Missing from Old Posts

I was checking out some old TRs this afternoon, and I noticed that in several of the posts, part of the text has been replaced with question marks. It seems to only happen to the first post of a thread, and for threads that are old (from 2000).

Here is an example:
http://www.coasterbuzz.com/forums/thread.asp?ForumID=13&TopicID=2256
After coasterpunk mentions the word "Kozmo" everything else is question marks.

Another example:
http://www.coasterbuzz.com/forums/thread.asp?ForumID=13&TopicID=2103
In RobCoasting's post it happens three times in the 8th, 14th, and last paragraphs.

Any ideas on why this is happening? Or am I must losing my marbles (and having them replaced with question marks)? ;-)

That's corrupt data, hurt when I switched ISP's two years ago. I'm trying to find it and delete it as best I can, as it tends to have harmful effects on the indexing process for the search engine.

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Jeff - Webmaster/Admin - CoasterBuzz.com, Sillynonsense.com
"As far as I can tell it doesn't matter who you are. If you can believe, there's something worth fighting for..." - Garbage, "Parade"