Been getting this sort of thing of late:
Closing the error popup and simply resubmitting always works, which makes me think it must be spurious, as does the fact that the messages simply are never "too long" - this most recent instance concerned a post with 1 line of text, and 2 images, each under 700 x 700, and totalling well under 1MB in size.
Closing the error popup and simply resubmitting always works, which makes me think it must be spurious, as does the fact that the messages simply are never "too long" - this most recent instance concerned a post with 1 line of text, and 2 images, each under 700 x 700, and totalling well under 1MB in size.