Google viewer thinks Storm PDF invoice is in Han Chinese?

Hi - great collection of modules, I love the built-in PDF invoice capability. Don't know if I set up tcpdf libraries wrong, but when I output PDF invoices and send via email, if the receiver opens the PDF via Google Docs, it thinks the filename is in Han Chinese and displays it as such, though I'm pretty sure it's not. The rest of the invoice displays properly in english. Downloading that same file and viewing it in Acrobat Reader renders properly all around. Anyone else experience this issue? Is it a Google docs problem, tcpdf issue, or ??

Thanks!