LXAppearance currently seems to set the cursor theme via this line in ~/.gtkrc-2.0:
gtk-cursor-theme-name="FlatbedCursors.Blue.Large"

However, there is a more universal method of setting the cursor theme-- ~/.icons/default/index.theme:
[Icon Theme]
Inherits=FlatbedCursors.Blue.Large

As it is, the current method of setting the cursor theme leaves the user with an inconsistent mouse pointer.