When using Trafficlight, PDF pages will not complete loading.
Instead, the page loading status indicator just sits there spinning and spinning and spinning etc etc.
If the Traffic light extension is disabled the page completes loading immediately.
If the traffic light extension is re-enabled then, again, the PDF never completes loading.
All the text is displayed in the page(s) but I guess as it has not completed loading, one can not use the "Save page as" link as that is greyed out until (I assume) the page finishes loading.
Ubuntu Linux 10.10 Maverick, Chrome 16.0.912.63,
Let me know if you require more info.