Twitter Media and Characters
Today while debugging, we realized something surprising about Twitter— attaching media to a tweet counts as characters and reduces the overall amount of characters available.
Try adding any picture to a tweet. You'll see the available characters drop. We experienced a consistent drop of 24, from 140 to 116, although this seems to have varied at different points in Twitter's history.
This can produce subtle failures in an API call; two-dozen (or so) phantom characters are subtracted just by adding an image and may push any tweet over the limit. Turning up our logs helped expose this issue.Tweet