Sounds none to good to me. Do you have the 4.01 update installed on your machine? The update release was issued about 6 months or so ago. What were you doing when it crashed? The reason for asking is I occasionally have the annoying "An error occured with UD, the program will close and you will swear very loudly" message.
Also, FYI, if I am running WinAmp at the same time I lose the ability to create RS connections at all!
May not help you very much I'm afraid but at least you're not alone!
M