ochameau/addon-sdk — comment on commit c4b799f9c276dbdf240cef23a791fcbe70e00009
File:  line 0
By warner:

Oh, you should probably precede this whole `for` loop with a `mkzipdir(zf, "locales/")`, I think the zip file needs to have a directory entry present before any files that are inside it. (some unpacking tools are dumb and don't automatically create parent directories for each file.. I think one of the mozrunner tools fell into this category).