I have the 10.5.6 version of Leopard, but this issue also happened under the 10.5.5 version.
So, Safari is always crashing/freezing, I first thought it was due to the flash animations (yeah because with some flv movies, such as on dailymotion, the CPU is 100% used!!!!).
Ok so what I did is to disable external modules, and also Java. But the problem is still there, when it loads some pages it freezes!!! And strangely when I launch it again on the same pages it doesn't freeze… oO
Very very strange thus…
Does anyone have the same issue?