Please note that Manga Rock 1.1 now adds support for iOS 4 with features such as Fast App Switching and Hi-Res graphics, therefore, you will need to upgrade your device to iOS 4 in order to install/update Manga Rock 1.1
iOS 4 is available for free on iTunes, just connect your device to iTunes and upgrade your device as prompted.
For those of you using jailbreak iPhone/iPod touch, please follow the instruction on this page to unlock and upgrade your firmware to iOS 4. (note: please back up your device before attempting to jailbreak it, we will NOT be responsible if your iPhone/iPod touch explodes or turns into Barney the Dinosaur)
Thank you and I hope you enjoy Manga Rock 1.1!