We have just released Exhibeo 2.0.10. This is a free update, which contains the following improvement:
Fixed a problem that could occasionally cause some thumbnails and images to be blank
If you bought Exhibeo 2 from the App Store, you can update via the App Store application. If you bought Exhibeo 2 directly from us, you can update by choosing Check for Updates from the application (Exhibeo 2) menu.