I use my Garmin Forerunner 305 for navigation and recording trips when flying, and I obviously don't want to use "Elevation corrections" when viewing my trips at Garmin connect, since that would change my elevation to ground level. Up until recently this has worked fine, but now I notice that i can't turn off the Elevation corrections. That is, I can click the "Disable" buttion, and it gets highlighted, but the elevations still show ground level and not actual elevation.
I also disable the elevation corrections when cycling, since it won't handle bridges very well.
Here's a link to an activity where the problem gets very obvious:
http://connect.garmin.com/modern/activity/589556470