Hmmm - I found some lines missing in displaying forum content.
What's about it ?
It's confusing me in some way.

So between Windows and Linux or Heap and Test area there is a line missing.
Sometime you find same behaviour on displaying threads in a (sub)forum.

Nothing missing in my IE8.

Stop using IE8. There's active malware and botnet exploit packs out here that M$ and Adobe don't even know about.
Just a warning for you

Maybe you don't have your zoom exactly at 100%? If you are using Firefox, try Ctrl+0 to make sure the page is not shown a little bit shrank.

That was it, exactly. Thanks. Now its okay.