Your code, some sample data, and an explanation of what Connotea is (rather than the statement that it "is not LWP::UserAgent" which is more than a little "utility-challenged" because it's likely that most of us knew that already) would perhaps help the Monks offer some suggestions.

Lacking those, my only suggestions at this point are
1) install one of the quasi-standard versions of Perl...
    and
2)don't respond to your own nodes with a follow up (AKA "redundant") request for help.

In reply to Re: Invalid content type in response: text/html..error handling by ww
in thread Invalid content type in response: text/html..error handling by smandape1

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