Whenever I open a browse dialog in Mac OS X Lion my finder becomes unresponsive (locks up) and scrolling stops working. I can use the mouse arrow keys to partly move around the finder and eventually after 10 - 30 seconds or so I can select things with the mouse again but it's very slow.
I think it has to do with a network drive I have setup. I think at one there was a login or wasn't a login, I don't remember but I'm guessing it's trying to connect with an old login. I don't know how to fix it.