I Experienced issue(bug or empty pop-up with chrome , FFOX and IE) with GC during workouts transfer(usb connect) to my FENIX2.
In fact i guess that problem comes from special character in title description (particularly % or " may be -).
i suppressed all these characters and i transfer data from GC to fenix 2 successful.
NB:pop up window asking me to start express fit , i click "do nothing", and synchronized with
Garmin express sw and its done.
Rodolphe
regards