Why can I sometimes not type into my <input> in IE?

Question

I'm having an issue where, periodically, I am unable to type into any input/textareas on Internet Explorer. I'm working primarily with IE9 at the moment.

When I click on an input, the JS click handler (which empties placeholder text) runs, and the active css is applied. However, the cursor does not appear and I can't type. If I tab to an input field, and start typing, everything starts working again.

I have a fair bit of JS running, but no errors running. I suspected TinyMCE had something to do with it, but it also happens when there are no editors on the page, so that doesn't seem to be it either. If you don't have an answer, I'd love an idea of what could be happening here that I could look into more, since I'm a bit stumped.

Answer 1

I eventually solved this. It was a strange and nasty issue with TinyMCE, where TinyMCE was being destroyed while the cursor was inside the main window. Fix was to explicitly focus out before it gets destroyed.