There are a few bugs I am encountering with this site today:
It appears the tagging system is broken, making it very difficult to ask questions, which may explain the low question rate on this site. It highlights previous search terms, instead of potential tags when I enter the tags. I can mitigate this by looking at previous questions and picking a tag to start with. When I go back to edit a question, it lets me add tags properly.
Question preview is not displaying as I type my question
When I try to post the question with incorrect tags, it "fails" silently without giving an error message.
Notes: I use Firefox, and this has worked properly in the past using Firefox.