Users of Sage 100 ERP (Formerly Sage ERP MAS 90 and 200) should see a fix to a pesky version 4.50 program issue which might double general ledger postings on some transactions originating in the Sales Order Entry module. The only workaround for v4.50 users has been to preview the sales journals prior to updating (View Sage Knowledgebase Resolution).
Update 1-25-2012: Sage have issued a program patch to resolve this issue
In a post on the MAS90 LinkedIN Group over the weekend Sage have updated their status (click image to view full sized):
