If you get this error messages:
t3lib_error_Exception PHP : Function split() is deprecated in /.../.../typo3conf/ext/simplevcard/class.tx_simplevcard_markers.php line 44
for simplevcard after upgrading PHP
comment out in class.tx_simplevcard_vcard.php on line 44
// $arrFields = split(",", $conf['linkTitleFields']);
and add this
$arrFields = explode(",", $conf['linkTitleFields']);
[Update: 2011.03.10] There are more deprecated calls further on
PHP : Function split() is deprecated in /../../typo3conf/ext/simplevcard/class.tx_simplevcard_vcard.php line 209 PHP : Function split() is deprecated in /../../typo3conf/ext/simplevcard/class.tx_simplevcard_vcard.php line 212 PHP : Function split() is deprecated in /../../typo3conf/ext/simplevcard/class.tx_simplevcard_vcard.php line 329
You could solve this like written in example above. Thanks to Barmann [/Update]