Trying to make a forum post with a single attachment that is 1.7MB I have posted other attachments ok in the past. Firefox on ubuntu 17.
Tried twice, with browser shutdown in between, no difference. It appears that nothing happens in browser. I did wait a while, as if the attachment upload will take some time.
Following the wait, I refresh, and page then says I tried to double post or clicked twice, which is not totally un-expected, I guess. I checked the forum, post is not there. Is 1.7MB still too big?
Sorry for the trouble.