star quitting when changing tapes

I have used star for about a year to backup about 50
gigs of tape (4 tapes).  I am not an advanced user by
any means.  Basically, I draw a full backup once a
month and then have changes backed up each night.

This was working fine for about a year.  Suddenly, I
began having problems with multivolume spans.  A full
dump would make it through an entire tape, prompt me
to change it, and then when I did and hit return, the
terminal window it was running in would vaporize and
the backup would end there.  I could make nightly
backups though (don't require entire tapes).  I can
also see what is on a single tape.  

It may be somehow related to a kernel or something.  I
started happening about 3 months ago.  I was running
FC4.  I updated to FC5 and it still happens.  I also
changed tape drives and it still happens.

any ideas.  I'm sure you will need more info, but I
don't know what to give you.  I am currently running
FC5 with  2.6.15-1.2054_FC5smp. 

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