Automator 2 , 3th party actions not working

Some 3th party actions (eg. convert raw to dng / photoshop actions) are no longer working in Leopard. They appear in the action column but i get an error if i want to put them in a workflow.

(After the installation of leopard i used fontexplorer to put out fonts i never use- I noticed that when fontexplorer had put the Thonburi font out of the system automator was not starting up anymore. so, maybe it has put out an other font preventing automator to function normaly.)

Is somebody succesfully using 3th party actions in leopard, did apple change something and do i have to wait till the actions are updated; or is there a bug in my system maybe related to a font?