http://blogs.technet.com/b/office_resource_kit/archive/2011/07/11/important-warning-for-access-2010-64-bit-customers-who-plan-to-install-sp1.aspxA customer recently contacted us via this blog about issues reported with Access 2010 and SP1. The issues reported relate specifically to the 64-bit version of Access 2010. Please see the topic Using 64-bit Access 2010? You may want to wait on SP1 onen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)