url escape codes not recognized correctly in host

Binary package hint: firefox-3.0

Firefox version 3.0.8

EDIT: Shorter version.
If you click this link: http://%E2%9E%A1.ws/%E3%AD%8E : Firefox will say it couldn't find the server. If you click in the address bar, and press enter, it will load the page correctly.

ORIGINAL:
I've got a short unicode-heavy URL - http://➡.ws/㭎 . (This URL was generated by http://www.tinyarro.ws - it's a similar idea to tinyurls.com, just a lot shorter. Btw this one just links to a funny article at TheOnion.)

I noticed when I linked to it, if I highlighted it and viewed the selection source, it would say href="http://%E2%9E%A1.ws/%E3%AD%8E". But if I simply right-clicked anywhere else and viewed page source, it would be href="http://➡.ws/㭎" as it was originally.

I noticed if you copy+pasted "http://%E2%9E%A1.ws/%E3%AD%8E" into the address bar, Firefox would say that the URL wasn't found. Pressing enter a second time would bring you to the page correctly.

That doesn't seem like a serious problem, but then I tried making the original URL a link on a WordPress website. Apparently WordPress parsed the link before serving Firefox the html - when I viewed the page source, it would say href="http://%e2%9e%a1.ws/%E3%AD%8E". If I clicked the link, I'd have the same problem as I had before when I copy-pasted the escaped code into the URL. It would only recognize it the second time.