Ovid,
I played the demo that you sent. When I play it, there are no dropouts, all of the guitar strums play fine (543 dreamy, and 422 fingerpicking).

Perhaps it is some issue unique to version 2009.5 and the updated versions of those specific RT's (ie maybe the original version of the RT's play fine in 2009.5, but the updates ones - which were updated in 2010 - require 2010 or higher).

Perhaps the solution would be (other than upgrading to 2011), to revert to the previous versions of those RT's. I'll ask support to mail you the older files for 543:dreamy as a test.

Have Fun!
Peter Gannon
PG Music Inc.