We've only heard of this error one other time and know of a few possible fixes, but haven't been able to get access to an affected site . Would you mind PM'ing us (---->) a login to your admin area so we can test a few options. This is rare and only occurs under certain PHP versions and in unique FB configurations. We'd love to get in there to debug the cause and find a final solution.
HELP ME! (Fatal error: Cannot use string offset as an array)
