[T-Mobile Samsung Galaxy S II SGH-T989] RealPariah:
Prolly answered, but hopefully this is helpful

IF THIS IS ALL YOU SEE ON BOOT SKIP FIRST PARAGRAPH AND TRY SECOND BOOT IN TO RECOVERY AND CLEAR YOU CACHE AND DALVICK CACHE AND THEN UNDER ADVANCED RUN FIX PERMISSIONS AND RESTART. DON'T GET TOO UPSET IF THIS DOES NOT WORK I BET YOU JUST HAD SOMETHING GO WRONG AND A FRESH INSTALL OF A ROM WILL HELP [BE SURE TO CLEAR CACHES AND /DATA AT VERY LEAST I HIGHLY RECOMMEND WIPING SYSTEM BUT UP TO YOU].

You could also look in to e2fsck. If you use a terminal emulator or adb if you cant get past that screen and a computer you can copy e2fsck [be sure to find a version that works with android [or try to run it from /system/bin or /system/xbin as it should be there I believe and with google you can pull out the command for it and run a disk check on any mounts [fdisk -l should work] use adb shell from any computer [again google if you need to download adb]

Also, you guys do realize unless you go way out of your way to purchase a super fast SD Card installing apps to SD will really slow the phone down as a whole and with 2gigs of system storage and 11G of sd for "standard google app to sd" [basically widgets will not work if app is on sd so keep apps with widgets on phone] and still keeps the phone reading remaining apps from phones memory [using "root apps2sd" method you are basically tricking the phone in to thinking space on the SD is actually the phones memory and is why things like widget will run BUT phone doesn't know what is SD and what is phone memory in this scenario it looks the same so any media file indexing or regular system caches end causing heavy SD usage and can be a HUGE bottleneck [just saying lets not start nit picking and figuring out who is bigger these are just my 2cents and I recognize your views may differ from mine and that is totally cool with me just throwing out my 2 cents for newbs and others who WANT to read it ;-)[/B]

I am pretty sure someone explained this already your System storage is different than your SD Card and internal SD Card [even though from what I have read system storage is a partition of the USB storage]. You would have to either [add/remove apps to your phone storage [installing to SDCard would not change system storage value], clearing your cache and/or dalvick cache [see recovery menu [hold vol up+down as you power on phone and release as soon as you see the white Samsung logo [release vol keys BEFORE it goes away]. wipe cache is on main men and dalvick cache is under advanced. You could also move apps in manage apps from phone storage to SD Card [will use USB Storage if you have not inserted a "real" SD-Card in to your phone] This may cause widgets to break or apps to slow down so be sure to use your judgement.

RECOVERY MENU FIX [POSSIBLE] in more detail

If all that did not work clear your cache [main menu] and dalvick cache [advanced menu] and then go under advanced and choose fix permissions and allow that to run [depends on how many files you have as to how long this takes but it usually is not long at all and then go back to main menu and choose restart system and see if that clears the issue for you.