PHP Warning in jetpack

Hi,

I found Jetpack will auto create a error_log file in the html root,
and it have a error message.

[03-Dec-2012 18:17:48 UTC] PHP Warning: array_map() [function.array-map]: Argument #2 should be an array in /public_html/wp-content/plugins/jetpack/modules/carousel/jetpack-carousel.php on line 197

what’s wrong with jatpack?
Thx

http://wordpress.org/extend/plugins/jetpack/