I have been using the free Mobipocket eBook reader on my BlackBerry every day since they released the application. I read books using it constantly and I was glad to see that development has continued after the release. Josep let me know that Mobipocket has officially extended support for the Bold and Storm in their latest beta. The previous beta worked well on the Bold but only ran in compatibility mode on the Storm which was annoying.
Now if you completely uninstall Mobipocket and reinstall the latest beta as of January 19th you will be able to run without compatibility mode. I have not noticed much of a difference on my Bold but you never know.