Another small feature is rolled out; if your track has GPS measurement errors they may be elevation or latitude/longitude.
For elevations it was easy -- uplad your track, go to "Elevation smooth" tab, click "Remove extreemes" and voila -- all elevation errors are gone. But for position (i.e. latitude/longitude) there wasn't this option. At least till now.
And, by the way, the algorithm for GPS elevation errors detection is now much better.