Resource packs used to work not long ago, but now I can't seem to get any to load for the 1.7.10 worlds I've tried. I've tsted this for the 3rd party packs Material Energy 4 and Blast off, and I've tried FTB Resurrection, but nothing works. I've tried boosting up the memory available to minecraft (up to 4G, even though the same resource packs used to work at 2.5G), but it still doesn't work. I go into resource packs, click in the > arrow, then click done. It seems to load fine, but then nothing changes and when I go back into resource packs the one I want is back on the available resource packs side. Has something changed? Why would the resource packs just stop working?