When printing from gimp using the gimp-print Epson Stylus Colour 760 output
filter to a print queue configured for that printer, the job fails
silently.  lpq showed nothing out of the ordinary.

After hunting around I found that one of the status file had something like
'cannot print data files' in.

When I changed the print queue to RAW it works.  It _used_ to (Guinness)
work fine when I printed raw to a non-raw queue; it used to get passed
straight through.  I don't mind so much that it doesn't now, but it
shouldn't just fail silently IMHO.