Manga+Press 2.7.3 is coming out soon. This version fixes an issue reported by a user on the WordPress Plugin Support forums relating to grouping comics by category. There is a beta of 2.7.3 in the WordPress Plugin repository now, you can download it [here] now for testing. I’ve been waiting on releasing this version because I want to test it out a little more to make sure it doesn’t break anything or cause more problems.
Be warned: if you use the “Group by Category” feature, this might change the behavior you’re used to.
Update at your own risk!