Hi Max,
I would have thought the answer would be 'NO'
The 'public domain' release of v1.6.1 (build 'wxyz') must surely be 'fixed in stone' at this point.
Instead, you leave that in place (once it is installed in your PC) and then simply download the 'bug-fix' file and copy it into your install directory, over-writing the original (faulty) module.
So, if you need to repeat the process on a second PC, for example (as I will be doing very shortly), then you still need to perform BOTH steps - i.e. download and install the 'normal' released version, and then copy over the bug-fix module.
Obviously, if you are sensible enough to download and SAVE the install and bug-fix modules, then you can just use this data to populate any secondary PCs that you own (assuming that you need PI running on those machines).
In my case, one Desktop machine done, four Notebooks and a Netbook to go!!
Cheers,