This topic again...
Every operating system has it's weaknesses. At least with Windows XP and other variants of Windows you have the ability to patch it - you can even run a scheduled update - so you can just forget about everything...
The reason why Mac OS / Amiga OS isn't exploited as much is because it's not used as much... I'm also pretty sure I can remember lots of virus's for the Amiga as well...
Now take linux - Red Hat actually makes you pay for the patches - great..
The operating system is only as good as the user - if you take care and patch it / use a firewall then you won't have many problems... however if you don't take care of it, like everything else, it will be crap...
Normally most problems with operating systems are down to user errors - Bill Gates for making lots of money has become hated... yet when there's a problem with anything it is quickly patched...
And for all of you who say 'well it should have been patched in the first place' even with the best testing it's still possible to miss something - and if you do it's much better to release a patch than try and cover it up...
Sorry for the long post but it seems to be a stupid comparison - like a topic 'is the ST more vunerable than Amiga' etc etc..
Macca.