*comma*(,) is a valid character for URL -

In revision #33127 regexp routines for url converting was changed, and the regexp for automatic url converting was expanded to exclude some more characters in URL string. But colon(,) character is a VALID character for URL, so should not be excluded.

see: http://www.blooberry.com/indexdot/html/topics/urlencoding.htm

...Only alphanumerics [0-9a-zA-Z], the special characters "$-_.+!*'()," [not including the quotes - ed], and reserved characters used for their reserved purposes may be used unencoded within a URL.
- from RFC 1738

p.s. Always thanks you for the instant improvements :-)