Well - needless to say - I can change it to 'linear' and see what happens.
There is no 'Accept' option in this case - only 'Dismiss'. I can 'Reopen' it and 'Dismiss' it all I want - but, that is it.
Thank you for your input - and, for jarring me out of my "tunnel vision" on this issue... :-)
(I literally ignored/overlooked it because I was so sure that it could not possibly be the cause of the error - because it was actually rotational.)
But - more important - the issue seemed to "just show up" without any changes to the relevant commands/settings having been made to the config.g file in a while now.
In other words, the relevant commands/settings in the config.g file have not changed for a sufficient amount of time as would have made the error show up much earlier...