Sometimes applications will move things around. I've actually had a somethng similar happen, but I can't remember how I fixed it exactly. Here's a stab in the dark.....(recess of my memory)
Open your system folder, and look inside all the folders that are labled "something(disabled)".....
I think I found that unicode file had been disabled by a program, don't know why....I just dragged it back to the active folder....restart.....no problem.....
If that fails, maybe a clean install will fix'er up....good luck