I would be willing to bet that the problem is viewing video on the web. Thats because Tiger is too old now, and doesn't support the latest Flash Player. You could safely update to Leopard without upgrading the ram, but you would soon need to upgrade that as well, because Leopard is on it's way out.
I would definitely upgrade the ram to at least 2GB, and update the OS to the newest, 10.7 Lion. You've got a great computer there, just an old OS. -Jonas -- You received this message because you are a member of the iMac Group, a group for those using Apple iMacs and eMacs. The list FAQ is at http://lowendmac.com/imac/list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to imaclist@googlegroups.com To leave this group, send email to imaclist+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/imaclist