Microsoft Excel has encountered a problem and needs to close. HELP!

The past few days, since March 31st, we have been receiving alot of error reports from our users that have encountered the "Microsoft Excel has encountered a problem and needs to close." problem. We (the developers) have not been able to reproduce these problems. Alot of the problems are happening when the users are using buttons on the sheets. For the buttons, we use a command button object. For example one of them has =EMBED("Forms.CommandButton.1",""). Is there anything that can be triggering these problems all of a sudden?

Since March 31st means since April Fool's day (Apr 1). Could anyone have
been passing around a joke addin?

--
Regards,
Tom Ogilvy

"LAF" <[email protected]> wrote in message
news:[email protected]...
>
> The past few days, since March 31st, we have been receiving alot of
> error reports from our users that have encountered the "Microsoft Excel
> has encountered a problem and needs to close." problem. We (the
> developers) have not been able to reproduce these problems. Alot of
> the problems are happening when the users are using buttons on the
> sheets. For the buttons, we use a command button object. For example
> one of them has =EMBED("Forms.CommandButton.1",""). Is there anything
> that can be triggering these problems all of a sudden?
>
>
> --
> LAF
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>

I don't think they were passing an add-in around. I asked several of the people having the problem and only one of them had some add-ins checked under Tools - Add-Ins. The rest of them had no add-ins.