Due to a problem in the Quartus® II software version 11.1 and later, the PLLJ_PLLSPE_INFO.txt report which is generated during compilation may have a M suffix which indicates it is for a military speed grade device. This problem affects designs targeting Stratix® V and Arria® V devices.
The M suffix is appended by mistake to the title of the file, and the data in the report will be correct for the speed grade of the device selected for the project. The PLLJ_PLLSPE_INFO.txt file with an M suffix will have no adverse affect on the timing analysis of the design.
This problem is scheduled to be fixed in a future release of the Quartus II software.