I did an install of SW 2013 on a machine with 2012 working nicely

After I install 2013, I found that the macros that run properly with 2012, doesn't work with 2013. (Even after changing the reference from 2012 to 2013)

Some of the features like date calender cannot run with 2013. This issue was there even with Beta test.

Did anyone experience similar issue with 2013?

Is there a solution available?

Thanks

JOHN