Why don Unicode (international) characters work with the ICQ transport?
If you previously have problems sending non-Latin characters to your ICQ contacts using Psi, you may want to try using one of the transports listed on http://www.chatopus.com/dev. If you are a JIT transport administrator, you may also want to download and install the patched JIT transport with unicode support – http://www.chatopus.com/dev.