just want to confirm that im also facing black boot screen problem problem is gone if i uninstall speedpatch. mainly i face this problem when i boot from Nitdroid to Maemo. when i select reboot in nitdroid it restarts device but when i select Maemo in multiboot it just stays at blank black screen untill i switch it off manually and restart it. Not having this issue when speedpatch is uninstalled.

and one more thing that was my first time when i installed speedpatch and really friends it boosts N900's performance. no lags, no stops anything. thanks Karam