Xavier Noria wrote:
The error logs mention unknown files whose name is the same one that the actual included files, but with "._" prepended. For instance, if the tarball contains "Makefile.PL" it turns out that it also contains a mysterious "._Makefile.PL".
U can read something about metadata in "Mac OSX Tiger for Unix Geeks" http://www.oreilly.com/catalog/macxtigerunix/index.html
The suitable chapter can be read online. On the last page th author says, that ._ files are created automatically, when you copy files to a non-Mac system.
Maby this helps?