After updating to 3.6.14 Silverlight only works intermittently. Most of the time I get the "Download Silverlight" logo/link. Plug-in is installed, disabling plug-in and re-enabling makes it work one time only. I have to do this every time I view a video, even the same video. Silverlight works fine on safari. Running OS X 10.5.8 on 2.66Ghz Intel Core Duo. I use this for work and having a hard time doing my job.