Problem(s) Encountered:

I followed one target far into the west and saw jumping in RA similar to the dec jumping we used to have -- amplitude the better part of an arcmin.  I was integrating for 1 min so couldn''t really follow the time history in detail.  The telescope always returned to position, and regained the guide star.  For reference, this happened within maybe a half-hour of the west limit at declination +23.  No time was lost.

Solutions:

I wonder if this may have been caused by a gust of wind.  The blurring seemed to settle in two states, effectively jumping from one position to another, before returning to the original state.  Winds were strong from the west and this sounds like it could have been a gust.