Thanks for the reply…
Since i posted the original problem,
We’ve migrated from wordpress 3.31 multisite to 3.5 single site using backupbuddy as the migration tool.
We’ve upgraded the calendar plug-in from version 1.7 to 2.15.
All is working now.. Sorry for the chase..
Love your theme.. we’re using it on our two main sites.. gotfolk.com and cus.com..