simplepie.inc.php not fully php-5.4.x compliant
This only seems to appear the first time you log into the ISPConfig web interface:
[warn] [client 192.168.1.64] mod_fcgid: stderr: PHP Strict Standards: Non-static method SimplePie_Misc::atom_10_construct_type() should not be called statically, assuming $this from incompatible context in /usr/local/ispconfig/interface/lib/classes/simplepie.inc.php on line 3252, referer: https://192.168.1.69:8080/index.php
[warn] [client 192.168.1.64] mod_fcgid: stderr: PHP Strict Standards: Non-static method SimplePie_Misc::is_isegment_nz_nc() should not be called statically, assuming $this from incompatible context in /usr/local/ispconfig/interface/lib/classes/simplepie.inc.php on line 3732, referer: https://192.168.1.69:8080/index.php
[warn] [client 192.168.1.64] mod_fcgid: stderr: PHP Strict Standards: Non-static method SimplePie_IRI::absolutize() should not be called statically, assuming $this from incompatible context in /usr/local/ispconfig/interface/lib/classes/simplepie.inc.php on line 9108, referer: https://192.168.1.69:8080/index.php
[warn] [client 192.168.1.64] mod_fcgid: stderr: PHP Strict Standards: Non-static method SimplePie_Misc::absolutize_url() should not be called statically, assuming $this from incompatible context in /usr/local/ispconfig/interface/lib/classes/simplepie.inc.php on line 14951, referer: https://192.168.1.69:8080/index.php
[warn] [client 192.168.1.64] mod_fcgid: stderr: PHP Strict Standards: Non-static method SimplePie_Misc::get_element() should not be called statically, assuming $this from incompatible context in /usr/local/ispconfig/interface/lib/classes/simplepie.inc.php on line 14971, referer: https://192.168.1.69:8080/index.php