Has anybody seen software-bugs on that DMM, too?
It has no software.
Sometimes the autoranging fails and instead of changing the range, the displayed value is just wrong.
Very dangerous...
I have yet to have this occur.
The update rate is 2 times per second on the UT61E.
When changing ranges, it happens that one update is messed up (sometimes it just moves the dot instead of dropping a decimal, for example when going from 22.124v to 25.12v, you get 251.24 or something like that). But this is basically shown for half a second (one update) with the next update half a second later, the correct value is shown.
Once you get used to it, it's not dangerous at all and these erroneous values can be easily scrubbed out of log file, if you do data logging.