Memory leak & next hotfix

Hello survivors! I have bad and a good news for ya...

The last hotfix (v0.88.1) fixed the major bugs, some of which were introduced in the 0.88 update.

There is however an issue with performance: some players report performance decresed after v0.88, I've tested myself and indeed seems there is some sort of memory leak appearing after few minutes of playtime.

The good new is I can fix it! The bad one is that in order to fix it, next update will break save compatibility once again...

I'm trying my best to workaround the issue preserving backsave compatibility, but can't guarantee anything.

Just wanted to let you know, I'll release the fix probably later tonight if everything goes right, so expect your saves to get earsed as soon as you update (maybe no longer the case, read above).