We currently use a pretty basic wireless setup. 3 access points, 1 per floor. DHCP and DNS handled by server 2003 box that also serves the rest of the building. WPA/TKIP security with pass-through auth to active directory.
For the most part, users have no issue. It connects, authenticates, and they can use the wireless for their whole business day. For a select number of users, it connects, auths, and they are fine for exactly 1 hour. After 1 hour it disconnects, immediately reconnects, and then no issues for an hour again.
I've checked a few things already, but if anyone has a recommendation, I'd love some input.