Notes client crashing when you tab to memo field

Since we upgraded to the 6.0.2 CF1 version of the notes client and then the new StdR6Mail design my notes client has been locking up everytime I tab down to the memo field to enter the body of my message. Has anyone else experienced this problem and is there a fix for it.Thanks.

Subject: Notes client crashing when you tab to memo field

We have the same problem on some installations using Win 2000 or XP. We use Notes Client 6.5 but with the old R5 Mail Template. No solution till now.