Odd - worryingly mahoosive - entries in my Revo error log

[2011-01-05 20:23:58] (ERROR @ /home/**MY DIR***/public_html/core/xpdo/xpdo.class.php : 1877) PHP warning: json_encode() [<a href='function.json-encode'>function.json-encode</a>]: recursion detected
[2011-01-05 20:23:58] (ERROR @ /home/**MY DIR ***/public_html/core/model/modx/modmanagerresponse.class.php : 398) PHP warning: file_exists() [<a href='function.file-exists'>function.file-exists</a>]: open_basedir restriction in effect. File(/home/**MY DIR ***/public_html/manager/assets/modext/<script type="text/javascript">
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