The first time I cycled through the visuals, my Rio rebooted it seems fine now. Here's what the new seek tool is! From the release notes!

New info mode - Seek Tool. The first time a track is played through
a profile is created, and then saved for future playback. The profile
is intended to identify phrases within the track, with active sections
plotted with bright pixels and less active sections with dim pixels. Note
that the plot will be dynamic until it has been completed, as each section
is relative to the rest of the track.

Within the Seek Tool the controls act as follows:
Left : skip to the previous phrase
Right : skip to the next phrase
Left-Hold : skip to the next track
Right-Hold : skip to the previous track
Rotary : seek within the track (press to change volume etc)