Yep, that old issue was me again
I added compatibility, disabled all features and tweaks for FXP in the "compat" tab and..
no change
This is a fully patched Win7-32 Pro and I did NOT see this issue prior to RC2 I think. I should have reported it then, but overlooked it because it didn't cause any issues. I have, however, seen issues now when I change directories sometimes it'll add random characters from other languages to the commands. I've been unable to replicate this in a manner I can detail exact steps with.