There is one workaround that another beta user, Boris, came up with:
--------------------------------
I have found a bizarre workaround using the nifty task
switcher that one can get with the power toys. The task
switcher will show the contents of the dislog when you use
the alt-tab. Read what it says and make your decision.
In dialogs with the ALLOW and DENY buttons: you will tab
once, after alt-tabbing to switch the focus, to select
DENY and tab twice to select ALLOW.
----------------------------------
The alt-tab task switcher is available here:
http://www.microsoft.com/windowsxp/d...s/default.mspx
My recollection, though, is that this power toy is associated with another
bug--perhaps visibility of a control window which shouldn't be--not sure.
--
FAQ for Microsoft Antispyware:
http://www.geocities.com/marfer_mvp/FAQ_MSantispy.htm
"Darryl "Datael" James" <(E-Mail Removed)> wrote in message
news

(E-Mail Removed)...
> Likewise, and yes, I have the most up to date version.
>
> I figured this would be the reason for the problem since it's non-standard
> (even though it's -far- cooler!) and it works with the taskbar
> horizontal...
>
>
> "Vertical Taskbar User" <(E-Mail Removed)> wrote in
> message news:043201c51750$501800a0$(E-Mail Removed)...
>>
>>>-----Original Message-----
>>>I run with a vertical taskbar (on the left hand side of
>>>my screen) and when it alerted me that something had
>>>happened the alert window shot up the right hand side of
>>>the screen, disappeared off the top, then a couple of
>>>seconds later flew back down again. I'm assuming it's
>>>looking for the top of the taskbar and obviously isn't
>>>finding it?
>>>
>>>Thanks,
>>>Darryl J
>>>.
>>>
>> I have the exact same problem. Vertical task bar on the
>> left. I hadn't considered the taskbar being part of the
>> problem. I hope this can be fixed as I want to keep my
>> taskbar on the left.
>
>