All my versions are made with old kernel. If there are some artifacts, maybe the memory footprint has the fault. I discovered, that when I reduce the size of the firmware, it has more velocity, and more stability. In lastest versions, only CoolReader has been updated, nothing else. But, some user, tell me about different conducts that not have to do with the changes made.
New kernel has a lot of problems. LIT, MOBI, PRC, XPDF, don't go. Shut down fail. Blocked up fail. Keys fail. Till Jinke publish an official firm, we not have to do anything.