Just upgraded a site to the new 0.1.5 and got this error
Warning: mkdir() [function.mkdir]: Permission denied in /home/website/public_html/wp-content/plugins/wordpress-seo/wp-seo.php on line 22
and it generated this in the plugins screen
The plugin generated 202 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.
It showed a conflict also with SI Contact Form
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/website/public_html/wp-content/plugins/wordpress-seo/wp-seo.php:22) in /home/website/public_html/wp-content/plugins/si-contact-form/si-contact-form.php on line 1138
But after I deactivated the SI Contact form and WP SEO and then reactived them I only got the first two errors this next time.
Any suggestions....Sorry Yoast, guess I am putting the plugin to the test.....;-)