Lollorian, on 26 Feb 2013 - 12:17, said:
You can check whether ToBEx is behind this by temporarily renaming ToBEx.DLL to something else and playing the game
If the issue persists, the culprit is something else 
That's a very good idea, Lollorian! Sadly, 'Tis hard to replicate the situation as Charm Person fails so often due to the +3 Save Bonus. I can confirm, however, that Dire Charm works as it used to - ran into an Ogre-Mage in the mountains who charmed both Branwen and Shar-Teel...who proceeded to destroy the rest of the party! I was able to Charm Person a Gnoll or two to keep them busy with that, but Viconia died in the end...
When 'Tis only Charm Person that works like this, I feel 'Tis not that big of deal. I was worrying Mental Dominiation and Dire Charm had similar behavior, however, which they don't. I will try your advice the next time I run into a Charm Person-caster. 