I noticed previously that when i try to root my lg x150 with assayeedkitchen it bootloops. Deodexing also makes some apps popup randomly and force close, even if i reset factory settings.
Now i used fbwintools and figured out how it works. It preserves all files permissions, user, group in file called statfile when we unpack ext4 image. But i noticed that when i repack it, probably during packing, all my permissions are changed, sometimes even groups. When i extract that packed file its stat file displays different permissions from the first original one. Yes, i used notepad++ to sort lines and put everything in same state so it can be compared.
Maybe that's same problem with assayeedkitchen and reason why it doesn't work...
Here are pics, see differences: