I do not doubt for one moment that you are seeing some sort of issue on your machine. The problem is you've effectively half mentioned a potential bug report but in a context (a Slashdot comment) where it is unlikely any one is going to follow up on it in a meaningful way. Instead of being useful I'm going to be tedious!
a) What is the nature of the death? Frozen screen? Screen corruption?
b) What graphics card are you using and which drivers are you using it with?
c) Which version of the kernel are you using?
d) Does it break the kernel or just X (i.e. does caps lock still work, can you still ssh into machine)?
e) When it crashes does anything appear in dmesg?
f) How frequently does the issue you are seeing occur? Can you reproduce it 100% of the time on demand?
g) Is your machine being forced to swap when the issue occurs?
I'm NOT going to follow up on the above but those are the questions that you would begin to have to answer to get insight into the problem you are seeing and attribute the issue to the correct location. Different answers to them would make different sets of people immediately stop investigating your issue which is why there are so many people complaining about bug reports that go nowhere.
For what it's worth an issue like this is either in the kernel or in X but it takes experience to be able to tell which and there is no guarantee of a resolution - a wild guess is that you have buggy graphics drivers (kernel/X) but that's about all anyone can say from the above. Regardless, Flash is the messenger and publicly linking it to complete system instability is pushing things too far...