Well, not exactly...

First, if I repack the odt file using unzip+zip from shell, Archive::Zip works fine.

Second, it is not a problem of file ownership, it is that it creates directories in which it itself cannot write, and this, in my opinion, is an anomaly.

On the other hand, if I use umask to set the x flag, then all the files would be marked as executable, and this would be an anomaly, too.