| Have you replaced any fonts to make up some space ?
plus have you done any other modding i.e. xmb icons, sound bar, battery etc as when i applied an xmb customisation when i load homebrew, games etc it just shows the wallpaper for me and loads in to the homebrew, and any mods other than xmb theme.
as a last resort you could reflash 3.03oe-c and try changing it once reflashed.
__________________ Black PSP 2.71 SE-C EU 
Black PSP 3.71M33-2 EU
Black Slim PSP 3.71M33-2
Nintendo DS + M3dssimply
Nintendo Wii + Wiikey
Xbox Self Chipped, Xbox 360 NME Self Chipped
Ps3
1GB Sandisk MS Duo, 2GB Sony MS Duo, 4GB MS Pro duo, 4GB Datel Harddrive
Grand Theft Auto LCS
Grand Theft Auto VCS
3600mAh External Battery
+Plenty of Homebrew |