I've been happily using Windows 8 since the RTM months prior to the retail release and I mostly like it, but I've experienced a lot of Explorer crashes. These aren't a huge deal because the OS detects the crash and restarts another explorer automatically within seconds, but it is a bit annoying that it happens so often.
I haven't really looked into the issue much because it isn't a showstopper but I suspect the problem has to do with thumbnail generation because I mostly see it when navigating folders full of video clips used for video editing. It is possible/probable that explorer itself isn't what is crashing but rather some dependent codec used for the thumbnailing is crashing, but it would be nice if explorer isolated itself better from such crashes.
I haven't really looked into the issue much because it isn't a showstopper but I suspect the problem has to do with thumbnail generation because I mostly see it when navigating folders full of video clips used for video editing. It is possible/probable that explorer itself isn't what is crashing but rather some dependent codec used for the thumbnailing is crashing, but it would be nice if explorer isolated itself better from such crashes.