Images are cutted and youtube-videos are breaking down in ie7, ie8

Question

hi muse-experts,
have the problem, that some images are cutted in ie7, ie8. the side is now working on businesscatalyst and another server.
images are cutted here on bc: http://trabbitour.businesscatalyst.com/angebote.html , http://trabbitour.businesscatalyst.com/ostalgisches.html , http://trabbitour.businesscatalyst.com/deine-trabbitour.html
the same on the other server: http://trabbitour.de/angebote.html , http://trabbitour.de/ostalgisches.html , http://trabbitour.de/deine-trabbitour.html
the videos are breaking down, by starting to scroll the side: http://trabbitour.businesscatalyst.com/trab(b)i-was-is-n-das.html
for ie adaption I inserted on all pages between html and head this line: <!— switch IE 7,8,9,10 to quirks mode —> but with or without this, the error is the same.
maybe you have an idea, what I can do and what the problem is?
thank you.

Answer 1

It's very difficult to say without knowing more about your system. There are a number of possibilities. First, your 13" lacks a discrete GPU, so the CPU is doing the work that a GPU would have done as far as decoding video streams, etc. Each video stream will consume considerable resources from the machine, and if you have multiple things running with video streams being decoded (for example, a browser with video Flash or cumbersome animation and iMovie running at the same time), then that may be a factor.
Additionally, it could be that you are memory constrained. You didn't post a picture of the process list from activity monitor or the memory usage stats, but you probably want to look and see what the memory and CPU usage is and who's consuming what. Some applications are pretty inefficient. For example, if you have iPhoto open and have thousands of images, the indexed metadata and thumbnails are all stored in RAM. iMovie pulls in clip thumbnail sets - (and worse, it has to do on-the-fly transcoding video assets from some cameras that don't encode the video using the parameters it expects to make indexing frames easier). Again, this would show up as periodic spikes in CPU activity for the app.
You seem to have plenty of disk space, that's not likely to be a problem.
Check if Time Machine is running. Time Machine introduces a performance impact, but it's exacerbated by the presence of frequently changed large files (e.g., you don't want Time Machine backing up your video projects while you are working on them).
Lastly, you may consider checking the console for error messages. This might reveal background processes that might be bogging down the system, or things like filesystem/disk errors. If there are errors in the filesystem, when you access certain portions of the disk, the OS and applications can slow down or lock-up as a result.