General Purpose Bit Flag not being set

This is an unreported bug in the Archive::Zip Perl module. This means that the level of compression will not be stored in the archives that are created, which may cause trouble with some extractors while inflating. PKWARE's application note on the .Zip file format states that these flags should be set.

Please see: http://use.perl.org/~alanhaggai/journal/37727 and http://use.perl.org/~alanhaggai/journal/37735.