Bug in Yahoo! mail?

I like using Yahoo! mail, and have been using it for a lot many years now. However, oftentimes, I seem to encounter a bug in its functionality.

When I click on '[Empty]' adjoining 'Trash' button, the desired functionality does not work. Instead of cleaning contents of the 'Trash' folder after seeking a confirmation from me, the system simply displays contents of the 'Trash' folder (as if I have clicked on 'Trash' button and not on '[Empty]' adjacent to it). However, many times, this click does produce the desired result.

Have you ever observed this when using Yahoo! mail? Please share your observations with me by posting comments against this post.