Modal dialog size too small if it belongs to other modal window

Steps to reproduce with transmission:
1) Select torrent
2) Choose "Set location"
3) Select "Other" to open folder selection dialog.
This dialog is too small and not resizable.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0-3.4-generic 3.0.0-rc5
Uname: Linux 3.0-3-generic i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,gnomecompat,compiztoolbox,move,snap,networkarearegion,unitydialog,regex,grid,mousepoll,vpswitch,imgpng,resize,wall,animation,place,session,workarounds,expo,ezoom,staticswitcher,fade,scale,unityshell,scaleaddon]
Date: Tue Jul 5 18:16:56 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=ru_RU:ru:en_US:en
 PATH=(custom, user)
 LANG=ru_RU.UTF-8
 SHELL=/usr/bin/zsh
SourcePackage: unity
UpgradeStatus: Upgraded to oneiric on 2011-05-30 (35 days ago)