Hello, if your shared folder is giving an error report there is definatley something in there thats making Santa crash....
I dont think it has anything to do with the updates though...
When the error report from your shared folder appears click on the part where it says more information (I think its something like that, I dont have an error report in front of me lol) Find out the code of the error and then do a search of your comp for that file, when it finds it delete it...

Once you have that done go back to your shared folder and see what file has gone..Santa should work fine from then on...

Please let me know how your going with this