Not sure if anyone has noticed this issue with their STB, but for some reason on my DVR, the display automatically changes from showing the time to the channel number for one full minute at the top of each hour. This has started ever since the recent update.
I checked the settings to ensure that it is set to show the time, but did not notice anything about changing at the top of the hour.
Some additional detail around this:
I was recording a 2-hour show (preset series), but watching a different channel at the time. Could that have something to do with it?
It appears that IMG 1.7 (the recent update you referred to) does this not only at the top of the hour, but when the guide indicates that a channel you are tuned to (or sometimes recording) a new program. I have seen it happen on the half hour and other times when a "new" program is about to start on a tuned channel. Just another new "feature" to get used to I guess