The insolvent banks are being bailed out by an insolvent FDIC.
From Richard Suttmeier for Minyanville, here:
The FDIC Deposit Insurance fund has now been drained by $2.2 billion in the fourth quarter to date, which brings the DIF Deficit to an estimated $19.8 billion. The FDIC has already burned through the assessments for 2010. The assessments for 2011 and 2012 have been pre-paid at $15.33 billion per year. ...
The three failed banks last Friday had extreme overexposures to C&D and CRE loans. C&D exposures for the three overexposed were between 143.7% and 654.7% versus the 100% regulatory guideline. The CRE exposures were between 896% and 1397% versus the 300% of risk-based capital regulatory guideline. The CRE loan pipelines were between 96% and 99% funded versus a healthy pipeline of 60%.