I dont recall if I ever installed page speed on a website I built but i have since moved it to my live account and now some images are not showing because of some additional information on the link and I am not sure if it is your extension that caused this? Does page speed do anything to image links on a page? I have an example where it should be referencing this image.

/images/gcs/global-color-survey-550.jpg

But instead it references this which is not a valid link to the image.
images/gcs/xglobal-color-survey-550.jpg.pagespeed.ic.WeAp4-qsED.jpg