[wp-testers] Fatal error pn Menu page

[Andrew Nacin]

" Object of class WP_Error could not be converted to string in
\...deleted...\wp-includes\formatting.php
on line 433"

That's wp_check_invalid_utf8(), which we run in many other functions. Could
you try providing some more information, such as a backtrace? It'd help to
know where we are returning WP_Error, why, and where we aren't accounting
for it.