Since installing Ubuntu 12.04, I've been having a problem with the mouse pointer size. On the desktop, it is quite a bit larger than it should be (24), though the different cursors (editing text, hyperlink hand, etc) are correct. The size changes to the correct size when the pointer is over some application windows (GVim, Netbeans, Firefox), but then changes back once it is moved out of the window.

There was a similar question here, but the Xdefaults solution did not work for me, and I didn't want to try the one requiring editing the icon image. In addition, I've tried changing the cursor theme using

sudo update-alternatives --config x-cursor-theme

as well as using the dconf-editor, but though I can change the theme, the size issue remains.

In case it's relevant, I'm running on a dual-screen setup with monitor sizes of 2560x1600 and 1920x1080, using the NVidia video driver. Is there another way to control pointer size, or a setting that might be messing it up?

EDIT: These are the values/options I have for update-alternatives and in dconf-editor. I'm now wondering if Netbeans and Firefox are making the mouse pointer smaller than it should be, but I'm not sure how big 24 should be...

update-alternatives:

  Selection    Path                                     Priority   Status
------------------------------------------------------------
  0            /usr/share/icons/DMZ-White/cursor.theme   90        auto mode
  1            /etc/X11/cursors/core.theme               30        manual mode
  2            /etc/X11/cursors/handhelds.theme          20        manual mode
  3            /etc/X11/cursors/redglass.theme           20        manual mode
  4            /etc/X11/cursors/whiteglass.theme         20        manual mode
* 5            /usr/share/icons/DMZ-Black/cursor.theme   30        manual mode
  6            /usr/share/icons/DMZ-White/cursor.theme   90        manual mode

dconf-editor:

I can't post the image since I'm a new user but the cursor-size is set to 24 and the cursor-theme is DMZ-Black.