Thats strange...I would try downloading a save file for brawl just to see if that was the problem, but I doubt it. You have the latest version of brawl+? what kind of sd card do you have and how big is it? You also might want to try reformatting your SD card completely (To FAT).
Updating to 4.3 might have changed something that you can't fix.
As for the roster screen...ASF1nk has some really awesome ones. not sure if they're what you're looking for though.
http://forums.kc-mm.com/index.php?topic=6201.0Well, trying to get the save file was my first thought, i did get one. but i cant figure out how to get it on my wii. the savegame installer doesn't work on .bin and it's the only file type i can find.
I SHOULD have the latest version of Brawl+, i redownloaded it from the homebrew browser and updated at least twice.
My card is a SanDisk for wii, 2 gb. it's worked before, but i'll try reformatting it.
EDIT: I think reformatting worked. thanks