I've had this happen a few times in my game (I can't remember when it started). When my Sims are eating or drinking, after they clean up, the glass or plate will stay in their hand.
They will go about everything normally, as if it's not there, but the glass or plate will eventually get the green gas indicating it's spoiled. It does go away eventually, but the solution isn't the same each time.
Edit By Crinrict: Adjusted Title fit migrated bug report: [ARCHIVED] Plates/Glasses get stuck on sims hand | EA Forums - 11473449
Archived thread had around 24 me toos
