Has anything changed on your server - this uses getimagesize() to find the real width. If it fails - the error is surpressed and there is no size used in the HTML.
If you want to see if getimagesize() on your server is throwing any kind of errors, in the code you can look for @getimagesize and remove the "@" (which surpresses the error).
But if this PHP function isn't working for you - my guess...it's either a server thing or a PHP configuration thing.
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