RDS-TMC GPS Gadgets and Navigation Articles

Upon touching "Recently Found" my Nuvi 750 stalls or locks up then shows the screen list of locations but one or two in the list shows a location followed by odd characters - Chinese/Arabic or a lower case, an "a" inside a circle or a couple of thin "T" or a couple of "d" inside brackets "(d)". This does not occur on each displayed location only one or two. If the next screen (down arrow) is touched and there are no unusual characters in any of the names on that screen, it updates quickly but any screen with unusual characters is delayed 8 - 10 seconds. Almost like it is searching for the character to display it.

I am concerned that this may be a precursor to a more serious problem and I want to head it off.... Any suggestions?

I have read that there is no way to reboot the 750! Is this correct? I've tried holding the on/off button in the on position but it only turns on then off after several seconds. I've tried touching & holding each corner of the screen while turning on and only the right lower corner works by asking me if I really want to erase all user data.