I run it on www.dragon-clan.de without bigger problem. I use everywhere non-spider url's. There are some litte problems allready described here in this thread but nothing real big.
I have 2 major problems, but this is not based on UBBt 6.5.1 (I noticed this before).
1) The cache timer doesnt work well. I set it to cache news for 10 minutes but it took time between 30 and 60 minutes, so I disable caching.
2) Setup 4 different newspals with 5 news each. Enable HTML, Names, Avatars and Date will sometimes crash the page generation by mysql (timed out or something else) I get an 503 error from my server. I change the newssetup as follows: Box 1 with name, avatar, date and HTML. All other boxes set to no pictures, no name, date and HTML. If I try to strip html too I get 503 again. Seems to much queries or so.
General I say, you can use it with 6.5.1
Remeber to fix the little bugs in the control panel
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