Backup import fails for random error, looking in logs you find some attribute was too big for its database field.

Turns out the problem is in OutgoingLink - data created on HSQL can overrun the length of the VARCHAR() field for link.pagetitle, then when the data is imported into a real database, it complains.

Fix: Add a bounds check to OutgoingLink.setDestinationPageTitle() (patched OutgoingLink class attached, suitable for 1.3 or 1.3.1 installations)