You can post any bugs here.
There is an option for anonymous posting.
If there is no "Comment" section at the bottom of the page, then click the link that says "comment" at the bottom of the page.
In the Comment section where it says "Comment as:", select "Anonymous" and the post will be completely anonymous.
There is a Captcha verification that is required by Google before the comment can be posted. It requires choosing photos from a selection of photos.
There are also options for posting as your Google account or as your name and URL.
You may post bugs or any other comment you wish.
Thank you.