Minimap not working correctly.

[goqe]

I recently started playing ToMe (latest release), but the minimap won't work.

I tried changing resolutions, enabling and disabling all video options, but to no avail.
The minimap starts out normal, but after a few seconds the explored areas disappear and only the pergament (?) on which the map is drawn stays blank. This happens on every level transition.

I'm playing on a laptop with Windows XP SP3.I pretty sure my card drivers are up-to-date.