Hat bug: yep that's a known bug but it only happens if you use the Inventory screen. If you use 'Q' and ',' to stow and recall the hat it works fine. This will be fixed in Version 6 on Monday.
Milking bug : yes this seems to be affecting all scripting and not just milking. Thanks
Repeat bucket : we'll be adding loads more instructions as we go.
Feeding bug : I've had this reported once before so I'll have a look into it. Thanks