Opening files in Repository Browser doesn't open correct program??

I’m new to TortoiseSVN, so I might be doing it wrong, or it might have been reported already.

When using the Repository Browser to view files, when I simply right click and open the file, it doesn’t open it using the right application. This may be a mime type problem either in TortoiseSVN or the SVN server application. I’m not really sure.

Here are three examples: When I open a .xlsx or .docx file, it launches WinZip to open these docs, rather than the appropriate office application. I know that this docs are actually ZIP archives under the hood, but is there a way to configure subversion so that these type of documents are opened with the correct application?

With PDF files, the PDF is loaded in my browser as binary (raw) data. It doesn’t launch acrobat to render it properly.

Is there anything I can do to fix this?

Thanks, Dave

p.s. I know that I can use Open With … to open these docs with the proper application, but I’d rather just Open them.