Help with Grub/Filesystem

Hi All,

Hoping someone might provide some insight here. I have a 13 in. MacBook Pro with ReFit installed and I believe Ubuntu 10.04 or whichever distro whose repositories included drivers the late 2010 or early 2011 MacBook Pro.

Recently upgraded to OSX Mavericks and shortly after running some update, Ubuntu will no longer boot. ReFit sends me to the Grub Rescue Command line.

I realize that these may not be supported here, but I believe my issue is with Grub or my Linux File system. I think I used Ext3 and maybe the Filesystem is corrupt or the Boot loader's config file is broken?

Does anyone here have any suggestions for identifying the issue and repairing?

Thanks in advance.