There's an easier way if you have root
Open a terminal app on your phone and enter the following commands
su
rm /mnt/secure/asec/smdl2tmp1.asec
Found this fix on XDA-Developers.com, that site is a God send!
I am NOT just posting this for the contest! :p
Seriously, it's neat that Samsung has released such great Android phones across all the US based mobile operators.
This should be a great phone.