During a recent review it was noted that we have an uncleared deposit from 11/14/04 for $540.00.  This transaction is NO WHERE in the checking accounts GL transactions.  Thinking back to last November, what I believe to of happened is:
 
On 10/29/04 Invoice 6786 was issued for $540 (to replace a product).
On 11/14/04 Credit Memo 6854 was issued for $540 (receiving back the original product).
On 11/16/04 via AR-C a ZERO payment received should have been entered to offset the invoice to the credit memo.
BUT WHAT I THINK HAPPENED INSTEAD was a $540 was entered then while trying to back out of the process the PC locked up (or something like that).
 
By the way, the AR Aging balances perfectly to the Balance Sheet.  The customer's account is in sync.  The only trace of this is an uncleared deposit which doesn't appear in GL transactions for the checking account.
 
Incase this is helpful, here is the BKART transaction info:
 

 
Also, I tried (in a test company) to remove the "0" transaction line and it still appears on the Check Register.  Any suggestions?

AWESOME !!
 
that did the trick.  still not sure how it got there... but it's all better now.