From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.3) Gecko/20010808
Description of problem:
The default mailcap entries for postscript print out the file, which
is almost certainly not what the user intended.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Attempt to view a postscript document in a mailcap enable appication
Expected Results: Either no action should be associated with the type, or
viewer should be invoked (suitably set up to avoid postscript security issues).
There is also `print' field in the mailcap format, which can be used
to allow the user to print a document if desired (instead of printing
being the default).
Fixed in 2.1.7-1.