It is impossible to enter URL with a port number (e.g. http://www.apple.com/main/rss/hotnews/hotnews.rss will work, but not http://www.apple.com:80/main/rss/hotnews/hotnews.rss)

This happens when a call to clean_param(..., PARAM_URL) is made and the url parameter performed with validateUrlSyntax(). Currently, it does prevent the port number.

Find below the diff to apply to have the port made available:

443c443
< if (!empty($param) && validateUrlSyntax($param, 's?H?S?F?E?u-P-a?I?p?f?q?r?')) {
—
> if (!empty($param) && validateUrlSyntax($param, 's?H?S?F?E?u-P-a?I?p-f?q?r?')) {