xpdf can not print via cups if started from firefox

[Warren Block]

On Tue, 8 Mar 2011, O. Hartmann wrote:

> I've got a weird problem here. Very often I download scientific papers as pdf 
> from protals and they got opened via firefox3 with the configured propper 
> utility, in this case xpdf. In such a case, printing is impossible. I hit the 
> print button, a popup shows up with the configured CUPS printing queue, but 
> hitting OK doesn't have any effect. The funny thing is: when opening the same 
> PDF (it is stored in /tmp/) with xpdf by starting xpdf from a terminal, 
> printing on the same queue works well.

In your .xpdfrc, do you specify a full path to the CUPS lpr?