Email attachments "Cannot create file"

Another user on the network was having issues opening .txt files on her computer. Word docs, PDF files and pretty much everything else would open, but the .txt files were getting an error that they could not be "created".  

It seems the problem is that the temp folder is located on the server, and somewhere along the line the permissions had changed. Fortunately there's a quick fix for this, which doesn't seem to have any drawbacks as of yet. A quick edit in the registry to change the file path from the server to the local hard drive and the problem is gone. 

Here's the link to Microsoft with the solution: http://support.microsoft.com/kb/305982