I've got Akismet key and enabled it.
If I post anything, get this error apparing instead of my post text, right in the message input area
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<b>Parse error</b>: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in <b>/home/aivanov/public_html/gorbostroyka/components/com_comment/classes/akismet/Akismet.class.php</b> on line <b>66</b><br />