I’m Using Notes 6.5.2 on XPSP1, accessing a mail file (6.5.2 DWA template) on a 6.5.2 server. In the Junk Mail folder, with the focus on one particular message, I choose Tools/Block Mail From Sender… and immediately get an Illegal Function Call dialog. Only one other message had this problem, and I deleted it. There are only 7 entries in my block sender list (all domains), added from messages before and after the message at issue in the view. Looking at the properties of the message at issue, it does not appear to be malformed in any way. Turning on the debugger is useless in this situation. Any suggestions?