#62 Incorrect URL processing?

I have some feeds with a + in their URL, like
http://manuzhai.nl/weblog/feeds/atom/life+meta+nl-nl/.
I would say this is a perfectly valid URL, I think I
can use +'s like that to denote spaces, right? (At
least PHP eats them for me...)

So, if I validate it once, that works just fine, but
then when it comes back, it puts a different URL in the
textbox that holds the URL: it now has %2B instead of
+. Then, the self isn't right anymore and the second
validation fails.

Is it just me, or is that wrong?