Client hangs with empty tabs

Hi there,

We have a user with a strange problem with his Notes client. He starts normal but after a while the Notes clients hangs. He can change to the different tabs(open applications) but all tabs are empty.

The only way to close is kill Notes.

I copied his program and data folders to a different machine, but i cannot reproduce it.

Strange thing is that he can reproduce it on a different, but similar machine.

Already reinstalled the client, removed workspace folder, etc.

Any ideas?

Thanks,

André