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Hi Brian.

: Hope this makes some sense.

Yes. Perfectly.
What you describe certainly isn't an issue with the forum application. It's the result of a cache being active somewhere between the forum application itself and "you" viewing the page.

Basically caches are supposed NOT to cache dynamic content, but sometimes caches are misconfigured by accident or ... intentional (shudder).

Main question is: where is the cache?
With the help of your description I could duplicate the issue from my end. I'm sure my connection to the internet is definitely cache-free. So the cache must be active on
- either your server
- or your hosts network between your server and the internet

I doubt pair.com has a misconfigured cache between individual servers and their peering point to the backbone. Thus it's likely a cache on YOUR server.

Options:
- the cache might either be ON by default or you've turned it ON somehow
- Drupal has "reconfigured" "something" . This is very likely because you mentioned the error page coming up now uses Drupal, which you never configured yourself.

If it's an Apache webserver, then likely it's "mod_cache" being active, Perldiver may tell you.

I'm not a Drupal specialist, but I know it utilizes a cache, probably it just enables the webservers caching feature.

Anyway ..... caching dynamic content is a misconfiguration imho.

Now, what could be done?

Best thing would be to have the cache configured correctly or even disabled.

Regarding this forum application there is a special variable to overcome caching issues:
http://tetrabb.com/documentation/WebBBS/BasicConfigs.pl?page=1;md=read;id=12

If you can't fix the cache the $DisallowCaching feature should help to solve the current problem. Feature should work reasonable well in 6.11 for all common calls to the scripts such as index, reads, profiles and such. However, 6.13 will improve it further.

Hope this helps.
Please let us know.

Have a great Sunday.
Rainer