Hi, I'm using Firefox 4.0.1 with Windows Vista and I'm having an issue with certain pages loading. Many pages such as youtube or Google Reader will not load fully, either loading in a more sparse and text-based way or not loading at all (eg Google Reader says that it is 'taking longer than usual' and to try loading in https, which sometimes works). However, about 10% of the time these pages load correctly, and some pages are not affected at all. I am able to open everything correctly in Internet Explorer. I feel like these problems started when I had my computer cleaned and had Microsoft Security Essentials and Window Washer installed on it, but I'm not sure if this matters. How do I fix this? This is a picture of the incorrectly loaded youtube screen, unusually, the picture shows the video having loaded (it usually just gives a black box and the video does not play): http://i54.tinypic.com/nwius5.jpg