The fix is present in Ubuntu Precise and in Linux Mint Lisa. In Oneiric, you can change the GTK theme (right click on desktop ⇒ change background to open the preferences window), or download the fixed GTK debs from Linux Mint repository here and install them manyally with
sudo apt-get install qt4-qtconfig
and set GTK+ as GUI style under System ⇒ Preferences ⇒ QT4 Settings.
Here's some extra, if you wish to work on resolving this problem:
For the icon theme (in particular the cursor) to be applied in QT apps, it may not be enough to use qtconfig. You might need to create the file ~/.icons/default/index.theme and paste in it:
[Icon Theme] Inherits=mate
If a dark theme with a dark background for caja is selected, caja opens with the wrong fontcolor in caja-view. Fontcolor is black instead of white. This issue is reported here: #81.
As a workaround you can set the background color under 'backgrounds/emblems' in 'edit menu' for caja-view.
Now caja opens everytime with the right fontcolor in caja-view.