Cannot make changes to specific folder

My phone is rooted with aokp build 38 on it. It is a Verizon Galaxy Nexus (toro) There is a folder /sdcard/data that I can't make any changes to. Some of my apps are trying to use this folder but are not able to because any changes to this folder fail. I tried deleting it but was unable to. I even used adb shell with root access and tried to rmdir, but it says "Permission Denied" I also tried to chmod 777 to give full access to the folder, but I still was unable to make any changes to it. I'm at a loss as of what to do to make this directory writeable again.