[McG]

There is a bug in the game where a skill can become locked and no longer be advanced for the rest of the game. This bug was found on the PC version. Any information related to the Xbox version is appreciated. Please note that I am a professional software engineer and amateur MW modder (soon OB too). I am very thorough on tracking things down. Please note it is impossible to clearly state the bug without spoiler information, but I tried in the next section to do so.

The no spoilers bug description:
There are a certain few quests that provide a certain kind of reward. This certain kind of reward causes a skill to never be able to learn or advance moving forward from that point. The skill is 'stuck' if you will. I have spent a couple of hours making sure there was no way around it except for not completing the quest. Unfortunately, I have no workaround. My digging into the quests in the construction set reveals a bug that needs developer attention. The only work-around in the construction set is to alter the reward to not be the certain special kind. Not a big deal to actually perform this mod, but a bummer in removing something interesting.

Spoiler description additions - skip if you understood the above:
There are quests (including Ftrs Guild rats, rescuing a girl, and a few more) that give as a reward levels up in a skill. The rescue a girl quest gives a boost of 5 levels in Mercantile. Afterwards, the Mercantile skill is forever stuck. I found no condition that I could get the Mercantile skill to be unstuck after receiving my reward. It has nothing to do with leveling up, sleeping, stat values or anything else under player control. There is a call within a number of scripts (ModPCSkill) that itself is not a script. That would indicate internal game code that modders don't have access to.

Izvor: ElderScrolls