Yes it is, and it is (partially) fixed. It happens with ALL GregTech machines (probably due the way its blocks are coded [tilemetaentity or something like])
Wait some seconds and it fixes by itself.
FWIW, I've only seen it happen with the translocators. My IDSUs, Matterfabricator and other GT blocks are not doing this. And it does not fix itself: the blocks look correct when I place them, and the GUIs work, but on each subsequent login the are broken and don't fix themselves, even after hours. I'm playing in FTB Beta A (MC 1.4.2 with GT 2.03b).