This is the short list of changes since the last version, 3.1.5
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Monaco}
# Date/time stamps of files in ZIP archives were not being restored properly
# The FTP mode could potentially create a junk folder apart from the temporary directory
# The INVALID_FILE_HEADER error message should actually be translated
# Creating directories recursively could fail if the archive contained a directory ending in a single slash
# PHP 5.2 on IIS will return a copy of the object when $o = Factory::method() is used instead of $o =& Factory::method()