My previous casual observations when using my 70-200 f/4L IS indicated that having the IS on while tripod mounted had a noticeable detrimental effect in sharpness. However, according to the list RBC5 posted, it has tripod detection. Has anyone else had a similar experience?
Doing flower macros indoors with my 100 f2.8LIS, I noticed a distinct improvement with IS turned off. Further to comments about not hammering the shutter button and instead giving time for the IS to settle down, I am sure I accounted for this at the time (this was 3 years ago) but even so I would turn IS off for the simple reason I would hate to miss a shot because I forgot to do so.