MacMinute has learned that a security hole in AOL Time Warner’s Instant Messenger, which can let a hacker take full control of a victim’s computer, only affects Windows-based PCs and not those using Macintosh computers or Palm devices. The hole is a “buffer overflow,” like the problem recently found in Microsoft’s Windows XP. By sending a stream of junk messages to the program, a hacker can make AIM vulnerable to other commands and control.