tashahm2,
I am having the same issue scanning from a workcentre 6505 to a recently upgraded 8.1 system. After a lengthy search of the issue, I found a microsoft knowledge base article confirming this is an issue in the 8.1 release and a fix is planned to be released in November. I guess we just need to sit and wait :(
It is the first bullet point under the known issues section:
http://support.microsoft.com/kb/2883200
Any forum moderators - Can you post as a sticky for others to locate more easily?
Hope this is helpful,
Guy