Been playing a few hours (huzzah on the fix last night!) with no problems but one. All the battlefield missions that have generated have had invicible towers and enemy bases. The ally bots will pile up at the first tower and hammer away at it but their shots go thru it and do no damage. None of my spells could hurt towers/base either. They hit - but no damage is done. Ultimately I just have to leave the missions because they are unwinnable.
There are no errors associated with this - it just seems to be.
Ill be happy to upload the world file if necessary - not sure on the steps to do so however.
EDIT: I see there is something about invincible towers in the bug tracker.