I have seen this issue multiple times...usually after a Calibre conversion...and I'm wondering if there was some obscure property of a nested span tag that I'm not aware of...
I see something similar to:
Code:
<span><span class="calibre26">CONGRATULATIONS</span></span>
The only thing in the CSS is ".calibre26"...no styling for "span span" or even for just "span" for that matter. To me that means the outer span tags are completely superfluous... (yay, I got my SAT word in for the day!)
Is there some device/app out there that requires the double span thing, or is that just a Calibre quirk?