@numericcitizen I'm not aware of any upload problems. Does uploading a photo on the Uploads page work? If you want to email me a screenshot of the new post page, that might help too.
@manton check your email! Thanks.,
@numericcitizen Does the Post button has no function or is the post just vanishing after pressing the button?
@manton seems to be browser-caching issue... it works with another browser which I never used for Micro.blog.