Error Messages in Trackback

When I have the trackback installed I get several errors in my logfiles.

I get this error several times on different lines.
strict warning: Creating default object from empty value in /home/topncal/includes/common.inc on line 328.

warning: array_merge() [function.array-merge]: Argument #2 is not an array in /home/topncal/modules/trackback.module on line 202.

warning: array_unique() [function.array-unique]: The argument should be an array in /home/topncal/modules/trackback.module on line 202.

warning: Invalid argument supplied for foreach() in /home/topncal/modules/trackback.module on line 205.

strict warning: Resource ID#58 used as offset, casting to integer (58) in /home/topncal/includes/xmlrpc.inc on line 635.

I am guessing this is because I am using PHP 5 insted of 4. is there a know workaround anyone has figured out. Or is this another issue.