Drag-and-Drop Clinging and iChat Problems

Here's the problem: I've been transferring pictures to my computer lately and sometime when I grab them and drop them off in a folder, they don't let go. I click on everything and other folders, trash, etc. and they still won't let go. This is getting really annoying because I have to put the computer to sleep to get it to go away. Is there a remedy for this?

Second problem: iChat will randomly start up without me even clicking on it. I've checked the preferences for it and it's not set to start up automatically and yet, sometimes it does. I was at class earlier and I came back and iChat was up and running. I know it's not my roommate because it has opened automatically before while I was surfing the internet. Is there a way to stop it from doing this?

I know it's rude and I hate to be pushy, but is there no one who has an answer for this? Usually there would have been an answer by now.