Just when we thought things were on the up and up for Maia Campbell.  We've learned that she was recently arrested...AND she's still in lock up!

Details and arrest docs when you read on...

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33-year-old Maia Campbell was arrested not once....but TWICE...during a month's time. Her most recent arrest was in Santa Monica on July 5th.  And she's currently still in custody pending a $40,100 bail.  She's allowed no visitors--despite the public being allowed to put money in her "jail account" via the web.

She's currently doing double duty at a rehab facility at Century Regional Detention Facility in Lynwood, California.  And she had her first court date today.  Ironically, this facility is the same place Lindsay Lohan is currently serving her 90-day rehab sentence.

Maia was also arrested on June 19th on 77th St. in L.A., then released 2 days later.  Here's the docs:

Maia's been dealing with bipolar disorder, as well as an addiction to crack cocaine.  Hopefully this round of rehab works out for her.  Sad situation...