When reparing an item needing lets say 1 wood and 1 HQ, it wont repair when having 1 wood and 1 HQ in the inventory but it uses the 1 wood and 1 HQ. When I have 2 wood end 2 HQ in the inventory it uses 1 wood and 1 HQ and repair the item.
I have also tested with -100% repair cost - this don't work at all.
This is only with the skill "Crafter" used. I have tasted it on a clean install.
It's the same on another servers I have played on - don't know what version they use tho.
Have tried the last 5 versions you have added - even the "fixed repair cost" version ...