I bought a new R10 at the end of October, and both of these problems (monentary freezing/pixelization and receiver locking up) happened to me right out of the box. I called D* and tried all of their suggestions, none of which worked, and brought it back to the vendor for an exchange. The replacement unit has never done this stuff. I have heard of other people having the same problem with new R10s. It is not normal. You have defective units which you should replace. Hmmm... maybe you got the one that I returned?