Not sure if this was ever changes, from the commit history, probably not.
Seems somewhere in the 1.7.X cycle, Minefactory Reloaded changed file names and folders so that the JSTR textures no longer load properly. I took the current files and renamed them and created the folders needed the make them work in 1.7.10. I did create a few new textures for some things that were missing, but they are nothing spectacular. Here's the zip:
http://www.mediafire.com/download/ahh623srw7yjbnn/Minefactory_Reloaded.zip
Not sure if this was ever changes, from the commit history, probably not.
Check out the post here.