Hobbit Generating Defunct Processes

I have Hobbit running on a IBM P6 lpar, with AIX 5.3 installed.   It seems about every 3-4 minutes a 'defunct' process is started by hobbit.  I have tried uninstalling and re-installing Hobbit, and rebooting the server. The defunct processes are still being generated.  Does anyone have any idea on what is causing this?  Thanks for your help.
Here's a sample of the ps output:

   50307 Z   hobbit 331868      0   0  38 rt        0:00 <defunct>
   50307 Z   hobbit 344096      0   0  38 rt        0:00 <defunct>
   50307 Z   hobbit 348368      0   0  38 rt        0:00 <defunct>
   50307 Z   hobbit 372982      0   0  38 rt        0:00 <defunct>
   50307 Z   hobbit 376944      0   0  38 rt        0:00 <defunct>
   50307 Z   hobbit 385200      0   0  38 rt        0:00 <defunct>
   50307 Z   hobbit 389226      0   0  38 rt        0:00 <defunct>
   50307 Z   hobbit 393276      0   0  38 rt        0:00 <defunct>


Ginny Jaworski