The following error message gets shown: "Warning: Parameter 3 to wfRenderHTMLet() expected to be a reference, value given in /.../includes/parser/Parser.php on line 3470"
Version: unspecified
Severity: major
The following error message gets shown: "Warning: Parameter 3 to wfRenderHTMLet() expected to be a reference, value given in /.../includes/parser/Parser.php on line 3470"
Version: unspecified
Severity: major
It looks like this was fixed in r67215 back in June 2010.
Try downloading a fresh copy of the HTMLets extension?