segmentation fault trying up update mailboxes.db

[Matt Emmott]

Hi,
I just upgraded our server to Cyrus 2.2.8, and am trying to get the
durn thing to start again. When I try running
/usr/cyrus/bin/cvt_cyrusdb /var/imap/mailboxes.db berkeley
/var/imap/mailboxes.db.new skiplist
mv /var/imap/mailboxes.db.new /var/imap/mailboxes.db, I get a
segmentation fault, and an error telling me the db is the wrong
version.

How can I fix this?
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