Thunar Bulk rename - button size problem

Hello, guys,

I've recently discovered that Thunar Bulk Rename has a too big
button in media tags rename regime.
What's that?

I've tried both custom theme and Clearlooks, then my Debian sid box and
self-compiled Gentoo box of my friend. They are all the same!

Proof links
http://fotohost.kz/show.php/447626_10.02.2012085206.png.html
http://fotohost.kz/show.php/446902_debianthunarrename.png.html