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It's best to use dimensions in your img code, since this helps speed up the whole rendering process, and if those images are already scaled both in size and resolution for that image size, then things work even better. This is what image optimization is all about, creating less file waste both in time and size during page loads for the user. The best way to prevent distortion with images, is to make sure they are scaled for their size and resolution, using a image editing program like photoshop ( paid ) or Gimp ( free opensource ) you can properly scale the images in just a way to keep the pixels at the right variables for the image quality. Here are a few articles to help explain further. http://www.sitepoint.com/resize-an-image-in-photoshop/ http://guides.lib.umich.edu/c.php?g=282942&p=1888162 http://www.wpbeginner.com/beginners-guide/how-to-resize-and-make-images-larger-without-losing-quality/ And a website that claims will resize without loosing quality, but be warned, I have not used it, just appeared in results and felt it could be of use. http://www.simpleimageresizer.com/

I don't think so...We had owned the domains for several years and the bad links have just come up in webmaster tools recently.

Hi Carly, if you want to know more or need further help: Bryan Dean's On-Page SEO Anatomy infographic serves as a good start. You may also provide a more concrete example by a private message via my profile page. I can help you.

It seems to usually take 2 weeks at most.

Hi As far as I know there is no way to do this in webmaster tools. You can test your robots.txt file with the Robots.txt Tester - but you need to actually update the real file to block URLs from being crawled. At any rate, normally you would not block 404s from being crawled - Google with either stop crawling them on their own, or this way if they are indexed they can drop out of the index.