The K2 guys solved it here.
It’s an issue with having the css gzipped on some servers. The workaround is renaming all the css files from *.css.php to *.css and doing a search & replace for .css.php in the code.
I went into the wp-content/themes/k2/css/ directory and renamed any *.css.php files to *.css.
I then opened up style.css in the wp-content/themes/k2/ directory and changed:
@import url(‘css/core.css.php’);
to:
@import url(‘css/core.css’);
Everything seems fine now!
FWIW, the site is hosted at Godaddy.com
Holy cow – is this thing broke or what? My perfectly nice forum login seems to have disappeaed since whenever this big upgrade happened, the first time I try to post it tells me that the page is not found.
For the record: if there’s somewhere that you can reset a password I sure couldn’t find it. (I’m using Opera) Besides, the system said that my user ID didn’t exist.