It is very likely that this change can be applied against the 1.2.8 base release. However, we have not tried that combination, so I certainly would not put it on a production server without some testing.
Also, please note, I do not recommend using the nightly build of 1/26/2010 as there is an issue in it regarding album sorting. That issue will be corrected in the 1/27 build. However, it is probably a good idea to let things mature--the image and album sorting has just been rewritten attempting to address a different problem.