Dina Lohan Serves Jailed Michael -- You're Still a Deadbeat!

10/26/2011 2:30 PM PDT

Michael Lohan got a special delivery while he was rotting away in a Tampa jail yesterday -- dude got served with new legal papers from his ex-wife Dina ... who's demanding $11k in unpaid child support.

We thought the kids were all in their 30s by now ... apparently not.