Is it possible to revert the latest update of the Gmail app for Android?
Revert to stock version, (as above)
then go here via the mobe's web browser:
http://www.apk4fun.com/history/901/ or here http://gmail.en.uptodown.com/android/old Find a previous version you want, download & install. Make sure the phone settings allow install from non-GooglePlay locations. Actually all quite easy.