Hi, I have had several follow up messages with regard to the issue I reported. I can reproduce this problem consistently by randomly - and quickly - depressing "Shift" and "Return" keys randomly until the screensaver dies, typically it takes a couple of seconds to do the job. I don't know whether this is a simple buffer overrun or whatever as I don't have *any* free time at the moment in which to investigate further. I have heard from other people who have been able to reproduce this on their own machines. What I want to know is - is it only /usr/bin/dtscreen that I should be looking at, or are there auxillary authentication programs which it calls directly or somesuch (by this, I don't want someone to explain to me the merits of PAM, unless there is a recent related issue I should know about). The /usr/dt/bin/dtscreen binary is thus: -r-xr-xr-x 1 bin bin 56168 Dec 2 1999 /usr/dt/bin/dtscreen It is likely that this is due to a missing patch on the machine in question, if so then I would be pleased to be informed of the number. Thanks people, Jon. P.S. There is a chance that a suitable reply has already been mailed to the list regarding this - if this is so then I apologise, I have not had chance to read every Bugtraq post over the last few days due to work.