I think all errors which were detected so far are fixed, same with the bugs reported. I added few new things to the shops, but there shouldn't be any problems with those.
There was way too little content to try so far, so I finally added one Skill for Skill Users, and one Spell for Spell Users. I tested them a little, found few situations which cause errors, but that's all. They need testing right now.
Also I added classes, which can be trained at level 10, however they don't have own skills yet, sadly. Once this skill and spell gets tested, I'll add new ones for all classes. That's pretty much all for now =)

P.S. In-game menu has option to report bugs (Help>Submit Ticket)