I am also having trouble uploading my Geocaching Drafts from my Garmin Etrex 10 using the new drafts page. I uploaded the geocache_visits.txt file and it told me it was not in the proper format. I went to the old drafts page and then it worked fine.
Don't see an option to upload my file here but here are the contents:
GC76N27,2017-06-24T11:16Z,Unattempted,"BECON"
GC73GEE,2017-06-24T11:31Z,Found it,"DINGWOODCOINFORLASERPOINTER PTDROP FP THINKUSEDBAT"
GC1K8T0,2017-06-24T11:56Z,Found it,"OLDLNL TBCARDROP NOSPOILERPICNEARBYLOG"
GC6HHR6,2017-06-24T12:27Z,Found it,"LAYINGOUT BISONOPENLOGINSIDE REHIDSEEPICS"
GC6ZAJ3,2017-06-24T12:54Z,Unattempted,""
GC6YDKN,2017-06-24T13:55Z,Found it,"POLE"
GC6YTD0,2017-06-24T14:12Z,Found it,"BISONPINE"
GC1FXP4,2017-06-24T14:31Z,Found it,"SMLLLNLGOLDCOIN COOLNEWAREA"