ZCM 10.3.0 on SLES 11.
I have a directive bundle with an action of a "Registry Edit" which should insert a dword into HKLM. I imported the .reg file into the bundle. The .reg file merges fine when run manually. Here is the contents of the reg file:

Windows Registry Editor Version 5.00

This key is to fix a DLU & NICI problem described here:
ZCM 10 is unable to update certain HKCU registry keys

I've created similar keys without issue, and this one isn't taking, but there are no obvious errors either.