About the suomi translation : thanks a lot but Ä works here, so i think you should check that you actually write in UTF-8. You can use notepad++ for example, it lets you choose the format.
About the cIOS rev9 i can easily make a version which is compatible, but is it worth it ?
About the bugs, i've fixed some of them, i hope it will be more stable for those who randomly return to HBC.
About the lag (most important to me), i've fixed it using a cache (thanks to kylling and his great title menu for inspiration). It's amazingly faster and more fluid, and it takes much less space than png's (85 KB per full cover) so i'll add an option to remove the pngs after caching to save some space. Don't worry it will be possible to put the png's directly on the SD card, and they will feed the cache on first load, internet won't be mandatory.
I've also improved the quality of cover compression, it was ugly, now it's almost as good as uncompressed.
The only thing i haven't fixed is Ocarina, i don't understand it, but it's not my priority (it's a cheat after all).
So, that was for the easy part. Now i have to add some logic, update menus and options, test it a little, and it's what takes me so much time. So, see you next week, i guess...
Thanks for the nice comments again.