Console errors when exiting my game

I'm just tidying up my Terrahawks LCD game, and want to git rid of the following messages that appear towards the end of the console.log file when I quit the game:

Exporting keybindings.
Exporting T2D preferences.
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (5 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (19 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (4 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (9 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (5 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (3 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (2 ref)
Shutting down the OpenGL display device...

I've put in .safeDelete() entries for all of my images, and that hasn't helped. In fact, when I run the spacescroller demo using the batch file, I get:

Exporting T2D preferences.
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (9 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (3 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (10 ref)
t2dImageMapDatablock::onRemove() - Reference Count isn't zero but image-map is being destroyed! (3 ref)
Shutting down the OpenGL display device...

So it seems to be something that T2D is doing (or not doing) rather than something specific to my game.

This is with the latest beta 1.1 v1.1. Any help would be appreciated.