I have an older farm that under load will exhibit an issue of the Citrix ICA session not accepting input and not changing the display save for the mouse moving. This seems to happen on different servers (physical and virtual ones), LAN or WAN attached clients, and doesn't seem to be related to the performance of the Citrix server itself (disk/cpu/net seem fine from perf metrics) I look at). There are no events in the event log that give me much to go on either. Any suggestions on where to look for a root cause to this issue? -Matt