I'm not sure if this is specific to me, but after I upgraded to Firefox Portable 1.5, I'm getting these small, half-second, delays when I type or use the mouse in Firefox. For example, if I manually type in a URL, when I first click my mouse in the address bar, there will be a small delay and then when I start typing there will be a small delay. Also, when I click to select a bookmark, there will be a delay. It happens sporadically, but enough to be really annoying. Has anyone else experienced this? I'm using Windows XP Home, with 1GB of RAM. I'm also using the Qute theme and I have the following extensions installed: