I have also been having the same issue. Try to post,resteem and get the "not enough bandwidth" message. Got it again a few minutes ago. Haven't been able to upvote or resteem a post about a little girl who won't eat because her father died! I haven't even used all my voting power. Flustered, it started yesterday. Thanks for bringing this issue to light for all of us minnows who really love steemit.🐓🐓