I wonder about which renderer you are really talking about. I think Firefox itself doesn't render RSS. Whatever renderer it is, it appears to be buggy. < and < are equivalent in XML like 'abc' and "abc" are equivalent in Perl.

A browser can't tell the difference between a static file and a generated file, so there is another difference. That difference is probably the real problem.

In reply to Re^3: Problems with HTML Encoding in RSS after moving to XML::RSS 1.48 by ikegami
in thread Problems with HTML Encoding in RSS after moving to XML::RSS 1.48 by camelreader

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