So I spent a good 12 hours today trying to figure out why my 4 line vbs program wouldn't run. Turns out Visual Basic and Visual Basic Script are completely different things! Who would have known!

I have written and debuged VB scripts in Outlook VBA editor before saving them as standalone scripts, and then adjusting for the differences. It's a bit annoying that they work slightly differently but I haven't found a good free VBS debugger.
At least you get a message telling you the line number when a VB scripts has an error.