I am using Joomla v. 2.5.24, with PHP v. 5.4.34. JoomSEF reports that it is up to date. When I edit an article, then click on "Save & Close", I get the error Fatal error: Class 'SEFConfig' not found in /home1/xxxxxxx/public_html/components/com_sef/joomsef.php on line 2913.

I looked at some older entries in the forum, but they referred to v. 1.5 of Joomla. Just to be sure, I looked in /public_html/administrator/components/com_sef/classes/, and config.php is there. The joomsef.php that the message refers to is dated 11/7/14, with a file size of 138 KB.

Now, in the past few days, Joomla has been a bit flaky when I log in as administrator, saying my password is wrong. I have also been having problems with premature end of script headers in index.php.

Is my Joomla install corrupted? Or is something else going on?