I have the same issue and now I have corrupted my SD.
Nedded to full format and reistall the ROM from skratch
Do any of you tried apps2SK or link2SD ?
I have reinstalled the system from skratch and now installed link2sd on an external 8Gb SD.
I made first partition 7 Gb FAT 32 Primary and second partition 1 Gb Ext2 Primay (both shall be primary).
Copy all your SD data to the FAT32 one than insert it in the mobile and boot.
I everything goes well, now you should see your FAT32 partition.
Now install Link2SD from the market (it is free) and follow the instructions.
You need to reboot once more and the mobile is OK. All your apps will be stored in SD.