Uploading to the Mac Store; Problem when verifying Metadata

I have a Mac game that I want to upload to the Mac Store. I have already done a lot of required steps.

For those who need more information on how to do this, you need to follow these information topics:

• this forum : http://forum.unity3d.com/threads/64453-Mac-App-Store/page7

• you must follow this blog for guidelines: http://technology.blurst.com/unity-games-and-mac-app-store/

• you may also follow the official guidelines here: http://developer.apple.com/devcenter/mac/documents/submitting.html

• I myself did not have the "productbuild" command available, you have to download it here: http://developer.apple.com/devcenter/download.action?path=/ios/ios_sdk_4.2__final/application_tools_1.1.dmg

The last problem I am stuck with is:

When adding the app with the Application Loader (step "verifying metadata", or so it seems), I have the error:

Apple's web service operation was not successful
Unable to authenticate the package: 415081493.itmsp
ERROR ITMS-4000: "Line 6 column 66: bad character content for element at XPath /package/software_assets/asset/data_file/file_name"

I wonder what this line 6 column 66 refers to. I wonder what this error might refer to. I wonder if one of you had this problem and may be of help.

I have tried to move the lines around in the Info.plist file, to see if this changes the error report (that is, provides another line for the error), to no avail. I have of course checked all metadata and they seem to be adequate.

Thank you for your help!!!