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Forum Moderators: phranque
The errors say that the link is empty because it contains no text.Well, it's empty because it contains nothing, whether text or image. Sprites don't count as images; they're background.
for a test? Seeing the "alt" text indicates that the actual image is not where it is being called for - or at least it is not loading for some reason. Making it local eliminates one possible cause for that.
<img alt="Blogger" src="/grey-sprite.png">