Opera, about the timeline slider.. In my experience so far, and it depends on your puter specs as well, the timeline does lag a bit when there are multiple animated objects in the scene with higher polygon counts. This seems especially true when importing a Poser animation through Transposer. I'm not sure if it has to do with the fact that Carrara is "hosting" the pz3 file, which puts some added burden on the processor, or what is actually happening, but I do see the same thing you do. On the other hand, if I load a lot of animated figures in Poser, and use the textured display, I also get a lag. It's helped by the fact that Poser allows you to "skip" frames when scrubbing through the timeline, but if you disable that option, then it does tend to lag as well, although not quite as much as Carrara. If it's of any use, I saw the same thing when using the Reiss Bodystudio plugin for 3dsmax and Maya. I don't personally own either of those apps, but my co-worker has both, and we tried importing a Poser animation using Bodystudio, and the timeline on both platforms lagged really badly when scrubbing through. The solution there was to use automatic bounding box display mode on the Poser elements when scrubbing over the timeline, which works fine if all you are doing is matching up a camera to the imported scene, or animating additional native elements, like particles, into your imported PZ3 animation. So far, I don't see any way that Carrara can automatically switch viewing styles when moving the timeline slider like you can in those other apps, so you'd have to manually switch view modes.