Since a week ago I noticed a strange forward slahs in search and buttons. Check for example http://www.melodiefabriek.nl/2012/06/het-verschil-tussen-een-liedje-en-een-opgenomen-liedje/
On th right you see the search including the text 'Search.../' with extra forward '/' slash. And the comment submit has an extra forwarslash as well sayin g 'Send/'
I disabled all plugins, disabled Google Translate, changed to default theme (and tried some other standard themes), checked my .htaccess but nothing seems to work.