i have a big error log in the chat module folder with lines like these

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[20-Sep-2010 05:39:38] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20060613/http.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20060613/http.so: cannot open shared object file: No such file or directory in Unknown on line 0

[/code]

what is this ?