Hi Dmitry,

It's cached mode I think. I've tried both here.

We don't do much when messages are selected. In the COM add-in, if
one message is selected then we attach an event handler to handle
reply, forward, etc, but if multiple message are selected we do
nothing. In the ECE we do some work in the OnRead handler (read a
MAPI property, look at, possibly update the HTML body), but that's
only called when a message is shown in the preview pane or opened.

Do you think selecting lots of messages could cause this type of
problem? I have been unable to reproduce it here - I've set up
mailboxes with thousands of messages but still can't break it!

Regards,
Pete.