Random Unicode Replacement characters/corrupt encoding at footer of PDF

[thomasmost]

Unicode replacement characters show up randomly at the bottom of my generated PDF. I wish I had better repro steps but it's only occurring at a client installation. In one instance this made the PDF generate wide to make room for the unwanted unicode string.

Any idea why this might be? Or what configuration I could add to avoid it?

Sorry I can't be more detailed. Any advice is appreciated.

[thomasmost]

whoops -- did not mean to close

I can't seem to upload my screenshot