This one has been kicking around the FCC for awhile. An low power FM station licensed to Georgetown TX (Austin market) was turned in for going above and beyond the definition of underwriting back in the summer of 2003. The FCC sent Power Radio Corporation, the licensee of KXPW-LP, a letter of inquiry shortly thereafter, but before PRC got around to answering, they were turned in for more commercial violations.
The low power outlet was fingered by Ixove Productions, another noncommercial entity which was the licensee of full power KNLE-FM Round Rock TX.
The FCC hit the station with a $20K fine on the basis of a total of eight noncompliant underwriting spots. PRC claimed it was unable to pay and submitted financial documentation. The FCC ultimately determined that it had enough to pay something, and turned down a request to have the fine waived. It did reduce it to $6K.