I just had the same problem. Powered up 0.333 STEEM and it let me post. Pretty strange, how does vesting thirty three cents give it all that extra bandwidth to upload my content? Well, that and I think my posts are pissing off some of the Whales (and hopefully getting the attention of others - not for 'attention-whoring' or hopes of upvotes, just because I believe in it and think they should get the most attention as they can get [not the artsy-fartsy stuff either]).
What used to be my penny upvote is now not even showing a value if upvoting something. Something smells funny, hope it's only temporary.
:}~
I Do Things For The LULZ.