From my mailbox - but shared since it's of general interest:

Just thought I'd let you know I noticed something a little odd about the board. When I clicked 'home' after posting today, I'm sure it brought back a cached page which didn't show my post as the most recent for its topic. I went back in case i'd forgotton to hit 'post' and did so... then there were two posts when I refreshed. Maybe it's a feature, maybe i just haven't woken up properly yet, but I have a feeling there was some cacheing going on there.

There *can* be caching elements involved - especially where the GET method is used and you have caching servers involved. There can also be problems where someone hits "post" then their connection gets broken - they feel the post was lost, but it wasn't.

It does happen.  I know it happens, probably on virtually every board (certainly this one's sweet compared to others I use ... I got caught into double-posting on a totally different board last night!); I think it's so much rarer on ours, and it's possibly user specific ... users who are effected, beware!

P.S.  Answering the real question too - I think that the YaBB software regenerates its "most recent" list every so many minutes, and then caches it as well. ....

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