I have a human dual classed fighter-cleric. I started him out as a berserker, got him to level 9, then dual classed as a cleric. The cleric is now at level 10 and got his berserker abilities back, but now I can't cast spells.
The odd thing is that I had hotkeyed 2 types of heal spells, and I can cast these. I can even change the spells to any of the ones in my spellbook, and cast them that way. But the general spell casting key is blacked out, like a mage-theif's would be if she were wearing leather armor.
I took off all my equipment to see if perhaps something was conflicting with the cleric portion of the character, but this did nothing to fix the problem.
The patch seems to be buggy: Chernobyls were described on this forum when playing with the patch. I recommend trying Xandax' solution first. The cloak should be CLCK27. Therefore:
1. CLUAConsole:CreateItem("CLCK27",1)
2. Try to get the icon back.
3. Throw the cloak away (you don't want to cheat, do you?).