Kobo Glo firmware 2.8.1 and kobohack-j
Kobo has released a new version of the firmware, 2.8.1 (see this MobileRead thread, direct download link). It contains various changes (see mentioned thread), but one thing that I liked is that it feels more snappy, quicker. And that page navigation in menus and lists is now done with swipes instead of using the slider.
I also have updated the KoboRoot.tgz with the latest release of kobohack-j, that is kobohack-j-130713.zip, and everything works as expected by now.