This error was shown on my Nokia E63 while trying to log in to my YM account.
Initially the screen was displaying "Loading list...", but after a while above error message was displayed.
Im not sure whether it has something to do with number of contact list in my YM account.
Currently in my YM account has 258 contacts in 12 groups.
I tried to log in using different YM account with less number of contacts, it was successfully connected.
Firmware version of my Nokia is
100.21.110
14-11-2008
RM-437
Nokia E63-1(26)