One more thing -

The errors happen more frequently in the afternoon:

Hour     Errors Logged
  8       114
  9       567
 10       660
 11      1040
 12       636
 13       205
 14      1389
 15      1412
 16      1224
 17       338
 18       288
 19        29
 20         7

This count is from another table where we only track "Record is in use by another user." errors.

Any ideas?

- George