I have a scorm package that works in Moodle. However, if unzip it to a folder and then rezip it and try to use it I get the following in Moodle:
"Incorrect file package - missing imsmanifest.xml or AICC structure"

Note, I'm doing this because I was trying to debug it and drilled down to this simple test:

1. Start with working scorm .zip package "TestCourse.zip"
2. On mac os x, I double click to extract it to the current folder.
3. I cmd click on it and selected decompress which makes "TestCourse2.zip"
4. I try to use "TestCourse2.zip" on Moodle as a scorm package and get the error above.

I tried using a different program to re-zip the folder and got the same results.
What am I missing here?