Update hangs

[Mark Edwards]

This keeps happening to me, I go to do a portupgrade and I get:

lilbuddy:~ paimin$ sudo portupgrade -ra
Updating the ports index ... Generating INDEX.tmp - please wait..

Which never stops.  I can leave it for an hour or more and it just sits 
there.  I have to delete /usr/ports/INDEX.db and download a new one 
using make fetchindex.

This just started a couple weeks ago.  Why does it keep getting hosed?