[galaxy-dev] Another trackster issue?

I am looking at bigwig files in trackster. When I zoom in the point where 20kb is displayed on screen I get large blocks of the track separated by empty gaps. When I zoom in to these gaps there is definitely track signal there. Is this a bug or is this intended to limit the amount of data to load? Thanks Shaun -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.