Originally Posted by knc1
Which of course assumes that the "noobs" running Windows have changed their preferences to display filename extensions.
Hmm... Which takes them out of the "nooby" classification.
I agree, stick with a meaningful extension, don't invent one.
If you need to detect if your using the correct file, insert a special reserved name file (like: MANIFEST) in the archive and then test for it.
BUT... If there is no program to open .lext files, the extension WILL be displayed. The option they have to disable to show extensions is called "Display extension for known file types"
@MaPePeR: That is a sensible idea...