Chrome Webstore “message.json” issue

Today I have encountered an issue while I was uploading new version of my extension to chrome webstore:

"An error occurred: Cannot parse message.json file from uploaded package."

I wasn’t expecting that since the extension was working locally without a problem. Also the error message says about message.json which was not a part of my package as the i18n files are called messages.json.

The error was trivial to fix (although not so easy to find) – I have put some comments into messages.json file, which seem not to be supported by extension gallery even though Chrome itself can handle them properly. But the thing that made me smile was that a Google guy created an error message with hard-coded (incorrect) filename. The gods have fallen ;)