Improper archive type recognition

[xerces8]

Sometimes it happens, that a browser renamers a file during download, so it becomes, for exmaple foo.tar.gz.tgz.

When this is opened by PA 9.x , it list the contents a single *.tar file, but a double ckick on it fails.

[davidsplash]

it would be nice if powerarchiver could look at the file and say whether the extention is incorrect and tell you. Irnfanview does this. with image file foormats so why can't pa with artchive file formats