Okay, so I wanted to look into it - and now it worked
To anyone having problems pinging Ping-O-Matic:
1) Check that you have the latest version of the PEAR XML_RPC library. The file system/pear/XML/RPC.php (or wherever your PEAR library is located) should have this line in the header (line 35 or thereabouts):
Text Formatted Code
* @version CVS: $Id: RPC.php,v 1.88 2005/10/15 20:29:43 danielc Exp $
That's the version that ships with Geeklog 1.4.0 and 1.4.0sr1 (XML_RPC 1.4.5).
2) If you get the error message mentioned above, enable the debug mode and try again: In system/lib-pingback.php, there are three lines
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//$client->setDebug (1);
all of which are commented out. The first one is for pingbacks, the other two are for sending the normal and extended pings.
Activate those two and try again. You will get some debug information on the top of the screen, followed by the "headers already sent" message which you can ignore in this case. Post the debug information here.
bye, Dirk