Help! !clrstack is not showing any method names

From time to time I get questions about missing method names in the sos !clrstack output, like this:0:019> !clrstack OS Thread Id: 0x5d0 (19) ESP      EIP 0f31f340 7c80bef7 [HelperMethodFrame_1OBJ: 0f31f340] 0f31f398 1449167a 0f31f3c4 144915e6 0f31f3f4 10d81b48 0f31f4b4 793e25cf 0f31f4bc 79366b3d 0f31f4d4 793e2734 0f31f4e8 793e26ac 0f31f678 79e7c0e3 [GCFrame: 0f31f678]Read more: If broken it is,