MP Exception raised with reserved bit set in MPFSR

Hi,

One of the guys here has just experienced a memory protection fault where one of the reserved bits in the L2 MPFSR is set, despite the manual indicating that they should always read as zero.

The values that I am getting are L2MPFSR: 0x00000090, L2MPFAR: 0x00000000, which has bit 7 set in the MSFSR; the latest Megamodule Reference Guide states, in table 8-5, that this bit is read-only and always reads as zero.

What does this mean?

Thanks in advance,

SPH