In regards to your edits at Acid3, you are invited to the discussion at the article's talk page.  Please discuss before changing the caption, as it has been explained numerous times that the caption describes the image.  The image is for Mozilla Firefox 6.0a1, NOT Mozilla Firefox 8.0a1.  If you wish to have the image updated, go for it, and upload Mozilla Firefox 8.0a1, the image and caption can then be updated.  However, I ask that you please not continue merely changing the caption, as it is incorrect.  It doesn't matter how many times you change it, it will be changed back.  If you persist, the page may be semi-protected to prevent further disruptive IP edits.  Thank you. - ™