Just to add a bit more info to the mix, the Safari problem for me can first be seen in a pop-up warning message (see first attached image), clicking the window [X] button closes the dialogue but the page won't load, clicking the OK button crashes (my) Safari. The Windows error box puts it down to Data Execution Prevention:
["Harmful programs can try to attack Windows by attempting to execute code from system memory locations reserved for Windows and other authorized programs. . . . If DEP notices a program on your computer using memory incorrectly, it closes the program and notifies you."]
IE7 produces the second screenshot, - I tried all the options with the same result.