There are several quest you should avoid.
I've confirmed one: The very FIRST mission of the Fighters Guild. You'll get a free mercentile training if you finish it. Mine wouldn't go up anymore...
Some forums claim every quest wich grants you a free training in a certain skill.
Found a mod to fix our problem
It removes the elite armors from the possible armor thugs can wear.
In other words: They will level, but keep their thuggish leather armor
Now realism is restored
*hail the nine!*
The B*ast*rds want you to register, but i've made an account for all of us:
Then you can d-load it without the spam ^^