pdb2mdb.exe broken in RC3

Hello all,

For those unfamiliar to building/debugging DLLs, refer to this thread; http://forum.unity3d.com/threads/how-to-build-and-debug-external-dlls.161685/

I've had issues with this throughout the Beta period with the pdb2mdb tool (can't process IEnumerables, crashes before it can run, etc), but for the most part there have been work-arounds. With RC3, I am completely stuck. I cannot get a PDB converted to MDB at all.

If I use the pdb2mdb tool from "Editor\Data\MonoBleedingEdge\lib\mono\4.5\", I get the following error every time it is run, regardless of the PDB it is called on;

If I use the one in "Editor\Data\Mono\lib\mono\2.0\", most DLLs are fine, but some crash on IEnumerables;

I used to be able to use the tool in "Editor\Data\MonoBleedingEdge\lib\mono\4.0\" to get around this issue, but it has not been provided this release. I submitted a bug report a couple weeks back but have heard no response about it.

Has anyone been able to make usable debug symbol files with RC3?