I have this problem that if a user is idle for too long he gets thrown out. This is what it says in the warning log for Openfire:

2008.05.14 13:35:06 Client provided invalid session: 963968a. http://210.51.22.222
2008.05.14 13:42:22 Packets could not be found for session ac1ae33c cannotbe delivered to client
2008.05.14 20:36:28 Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended.
2008.05.14 20:36:29 Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended.
2008.05.16 11:48:33 Client provided invalid session: a93f5ffb. http://210.51.22.222
2008.05.16 11:49:25 Deliverable unavailable for 204441
2008.05.16 11:57:30 Deliverable unavailable for 732423
2008.05.16 12:05:36 Client provided invalid session: 209dc4ba. http://210.51.22.222
2008.05.16 12:07:06 Deliverable unavailable for 384098
2008.05.16 12:18:43 Deliverable unavailable for 654839

Does anyone have any idea of what this means?