I have been getting errors when trying to upload header images. The error page title is "WordPress Failure Notice" and the error message that displays is
"Are you sure you want to do this?
Please try again."
with a link on the "Please try again" that takes me back to the Custom Header page.
After some troubleshooting, we've determined that this problem seems to be tied to WP RSS Aggregator. When the plugin is de-activated, I am able to upload a header image without any problem. If I activate it again, I get the same error on upload.
Is this a known bug? I tried searching this forum, but didn't find anything.