This is a new feature in firefox-3.0, which renders the bulk of the selected text as an image that moves along with your cursor as you drag it. Sadly, due to some bug (maybe in firefox, because in firefox-3.1, it works like a charm!), it is not compatible with kwin compositing. To disable this feature and turn back to the good old icon style, edit the following in about:config:
nglayout.enable_drag_images
Make sure it is set to false.
Since the bug was missed in firefox 3.0, you probably won't see it fixed on mozilla, so someone would have to provide a patch
This is a new feature in firefox-3.0, which renders the bulk of the selected text as an image that moves along with your cursor as you drag it. Sadly, due to some bug (maybe in firefox, because in firefox-3.1, it works like a charm!), it is not compatible with kwin compositing. To disable this feature and turn back to the good old icon style, edit the following in about:config: enable_ drag_images
nglayout.
Make sure it is set to false.
Since the bug was missed in firefox 3.0, you probably won't see it fixed on mozilla, so someone would have to provide a patch