I also have problems with this type of accespoint, i have 2 (one in AP mode and the other in Client/Repeater mode).
Very often the connection between the pc and the repeater, and also between the 2 accespoints just "drops" out (like its resetting itself).
The accespoints are in enough range of eachother, so thats not the problem.
After the contact with Cisco here in Holland they said this type (4410N) is not stable with the 18.104.22.168 firmware, and its also limited to the B and G (not N) wireless, because else the accespoint will be even less stable??.
When can we expect a propper solution to this Cisco problem?