Mac quarantine bug returns to Leopard

Question

In my email today from ITWire:
*Mac Quarantine Bug Returns in Leopard*
Mac OS X includes a mechanism that's supposed to warn users before they execute files downloaded from the Internet, but the reappearance in Mac OS X 10.5 Leopard leaves systems vulnerable to Trojan attachments received in Mail.
The issue was fixed by Security Update 2006-001 for Mac OS X 10.4 ("Download Validation fails to warn about unsafe file types"), but somehow made its way back into the latest version of Apple's operating system.
http://www.itwire.com/content/view/15458/53/
comments, please, support staff? Are we getting a security update sometime soon?
Also, is there anywhere in this forum or a definitive article regarding Macs and infections?
As far as I know (which ain't too much):
--Macs are generally invulnerable to viruses but can be inadvertently passed on via email. (Is Mail safer than Outlook or Entourage for Mac, which comes in MS Office for Mac)
--Viruses are passed on in .exe and other PC-based files.
--Viruses can't be passed in image files or .pdf files.
--Viruses cannot launch unless a file is opened.
--As Macs get more popular, will they be more vulnerable?

Answer 1

Same issue; I share my Documents folder and everyone can see the folders below it but have NO access ot most of the sub folders (the minus symbol). The one exception is a folder "Civilization IV Demo";
Permissions:
Documents (MAIN FOLDER):
tpfannes(ME) read and write
everyone read and write
Sub folders (sub folders under Documents)
Civilization IV Demo (works):
tpfannes(ME) read and write
everyone read only
staff read only
Data Folder (No workie)
tpfannes(ME) read and write
everyone no access
I did a erase and install with Leopard and restored the files from a backup using Apples Backup utility.
I could probably get to a terminal window and modify permissiosn these via. chmod but I'm not all that comfortable with that.
Any ideas????
tim