I have downloaded flash-0.4.10.tgz to my home directory and tried to unpack it with tar -zxvf flash-0.4.10.tgz,this was the outcome.
linux:/home/Kat12 # tar -zxvf flash-0.4.10.tgz
gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error exit delayed from previous errors