I have tried both examples included in the package. Everything looks fine but when I checked the destination folder all filenames are changed to version+filename.
In examples/tutorial/packages/com.vendor.product/data is only one file, it's called 'installcontent.txt'. After I've installed the sample to /opt/packages the file is copied as '0.1.0-1installcontent.txt'.
Have tried it even with my own examples, but same problem. The '0.1.0-1' is the version-tag from examples/tutorial/packages/com.vendor.product/meta/package.xml.