http://screencast.com/t/i7CXxIZdbGSc for evidence of the documentation as of 2:28PM PT March 6 2013
Using https://api.twitter.com/1.1/help/configuration.json, we are finding that characters_reserved_per_media has a value of 22 characters, as it has for some time now.
However, the API is acting like photos take up 23 characters as of the last couple hours, and is rejecting update_with_media calls that have a photo and 118 characters (no URLs).
It’s feasible to have 3rd party services dynamically update with your help/configuration endpoint to set media character allotments, but when the API and documentation ceases to be accurate, this seems like a pretty nasty bug.
This is affecting numerous Fortune 500 enterprise brands that use our platform for marketing on Twitter. Any help would be appreciated, thanks!