tar r stopped working...

[Brain in Neutral]

Hm, I don't seem to be able to "tar r" anymore after upgrading from 1.2
to 3.1.  "Archive backspace error".  What gives?  The tar tape I'm trying
to append to was written under 1.2; is there some special compatibility
flag I need to specify, or is tar just broke?  (8200, TU81+).

Paul DuBois
Internet:	dubois at primate.wisc.edu
UUCP:		rhesus!dubois
FAX:		608/263-4031