captaink,
Ok spent a bit of time on this and have not found a solution yes unfortunately.
How many sites are on your MSM license?
Can I get you to do a few things for me please?
I saw this work for a similar issue recently. Can you empty the exp_security_hashes table in your db. Just delete the rows that are in there not the table itself. make a backup of your database first.
Can you upgrade to most recent build (20110411)
Can you install this accessory please and let us know if any issue appears there
Let us knwo if any of that works please