Folder Action Problems with Leopard 10.5.8

My company recently upgraded from 10.4.11 to 10.5.8 and our folder actions have been stopping mid-process or not working at all. Sometimes a few files will process and then everything stops completely.

Our workflow involves the use of several different hot folders that use folder actions (converting InDesign CS4 documents to various quality of PDFs). All of the actions are single stream, meaning each folder does the action it’s assigned and the original file is trashed and the new file remains in the folder. There are no subsequent folder actions that pull from the newly processed files. We also only run one folder action (with several files dropped in it) at a time.

I have also tried running a pre-made generic folder action script from Apple and it, too will stop mid-process, process a few files then stop, or not work at all.

Does anyone know what might be causing this problem with either the new Applescript or Folder Actions with Leopard 10.5.8?