When the "Ask question" form reappears after trying to submit a question with an invalid tag, the "Ask on which site?" text/search box has focus, this then brings up all sites.
Shouldn't the search only trigger popup after a few characters have been entered?
To reproduce :
- Try to submit question with non-existing tag.
- Notice "Tag not valid" message.
- Press edit.
- Question form reappears with popup of all sites.
Offending question and the result after pressing Edit
(Image resized, click to see the full size)