Attached is a web archive of http://www.milliyet.com.tr , one of the most popular newspaper in Turkey. To reproduce the bug click on the upper right picture (which is the picture of our president), the one with moustache. Which also contains the text "Başbakanlık'ta ..."
Now if you click the link its supposed to go to default.aspx?...blabla but instead it goes to %20%20...%20default.aspx?...blabla , somehow the whitespace is getting encoded.
Uploaded web archive to http://cekirdek.pardus.org.tr/~ismail/tmp/milliyet.webarchive , too big to attach.
Created attachment 19502 [details]
reduced test case
Confirmed with r30710. Firefox works as expected; haven't tested IE.
Maksim Orlovich of KHTML fame fixed this for khtml: http://lists.kde.org/?l=kde-commits&m=120458484225762&w=2
This bug is still reproducable with latest ToT and makes one of the biggest newspaper website (in Turkey) unusable.
Test passes with latest trunk, closing as fixed.
Likely fixed in r58844.
The test case is a little different, so I landed it in r62800.