Facing problem after upgrading the kernal patch level to 142900-12

I have a Solaris 10 OS having kernal patch level 138888-03 on several servers but recenlty I upgraded it into 142900-12 on some T-Series servers & v890 server after install them my syslog is increasing at a rate of 1GB on average on all servers . I believe its a bug, can somebody help me in finding the patch for removing this bug.

why not open a call at oracle?