> > It is not a very bad idea. A big message box will be intrusive (and 
> > scary) but users will learn very quickly how to avoid it.

> No they won't, they'll just come and complain at you, and at us. Users
> do not read error boxes, and they certainly don't read intrusive and
> rude ones like the one you suggest.

*nod*, *sign*

> Andre's suggestion of a status bar message is probably better, but I
> still doubt many will ever see/read it.

How about a red \alpha instead of black one? Or, a red error box like 
the ones after we compile the file?

-- 
Bo Peng

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