I’m using OS X at my MBP as a main operation system and iStat Pro widget for Dashboard to monitor temps, processes, etc. After upgrading to OS X 10.8 Mountain Lion the processes section was not working.

Here is a small instruction to make processes be displayed again.

1. Open iStat Pro widget directory, it is located in ~/Library/Widgets/iStat\ Pro.wdgt/ or /Library/Widgets/iStat\ Pro.wdgt/ (in Finder you should use Show Package Contents in context menu of the specified folder to open the widget’s contents);

2. If you are using horizontal (wide) widget edit the Wide.js file and if vertical (tall) - Tall.js;

3. Find function WideSkinController.prototype.updateProcesses = function(){ and replace all PID|$1 with PID| $1 (add space after pipe) in this section. So, you should get something like this:

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WideSkinController.prototype.updateProcesses = function(){
  var _self = this;
  var exclude = "";
  if(p.v("processes_excludewidgets") == 'on')
      exclude = " grep -v DashboardClient | ";
  
  if(p.v("processes_sort_mode") == 'cpu')
      widget.system('ps -arcwwwxo "pid %cpu command" | egrep "PID| $1" | grep -v grep | ' + exclude + ' head -7 | tail -6 | awk \'{print "<pid>"$1"</pid><cpu>"$2"</cpu><name>"$3,$4,$5"</name></item>"}\'', function(data){ _self.updateProcessesOut(data);});
  else
      widget.system('ps -amcwwwxo "pid rss command"  | egrep "PID| $1" | grep -v grep | ' + exclude + ' head -7 | tail -6 | awk \'{print "<pid>"$1"</pid><cpu>"$2"</cpu><name>"$3,$4,$5"</name></item>"}\'', function(data){ _self.updateProcessesOut(data);});
}

1. Restart the iStat Pro widget and the processes list will be working again!