Greetings! I am new to using Mac's so bare with me. When I use iChat AV 2.0 (v145) almost immediately the program starts to use an inordinate amount of system resources. I'm pretty sure it only started doing this when I upgraded to Panther. My upgrade to Panther was just that, an upgrade. I did not do a clean install. My current version of Panther is 10.3.3. My Mac is a 12" AluBook, 867mhz, 640 MB of Ram. If you need any other info about my setup please feel free to ask.