i have some similar issues (safari and other apps crashing) and some more:

- USB problems
- scratchy alert sounds
- time machine doesnt work

i tried marvins but i am not sure if i did it right. i choosed "create a patcher package" and selected the system volume. then i ran the application. i got following log:

**************************
* Marvin's AMD Utility v.25 - 2008.02.28 16:29:38
************************************************** ************************************************** **********
* Input arguments:
* target_dir="/"
* dmount="/"
* cat="leopard"
* do_make_patcher_pkg="yes"
* simulation_mode="yes"
* undo="no"
************************************************** ************************************************** **********
Searching for binaries in: /Applications
Searching for binaries in: /Backup Extensions
Searching for binaries in: /BaseSystem.pkg.142RyhlY9
Searching for binaries in: /Library
Searching for binaries in: /System
Searching for binaries in: /bin
Searching for binaries in: /home
Searching for binaries in: /private
Searching for binaries in: /sbin
Searching for binaries in: /usr
Done searching for binaries. See the list in: /Users/doolak/Desktop/AMD.Patch.Folder/2008.02.28_at_16.29/logs/binary_filelist.txt
************************************************** ************************************************** **********
¥¥¥ CPUID found in binary: /Applications/Firefox.app/Contents/MacOS/libfreebl3.dylib
¥¥¥ CPUID found in binary: /Applications/VLC.app/Contents/MacOS/modules/libx264_plugin.dylib
¥¥¥ CPUID found in binary: /Applications/VLC.app/Contents/MacOS/VLC
¥¥¥ CPUID found in binary: /System/Library/QuickTime/QuickTimeComponents.component/Contents/MacOS/QuickTimeComponents
*** err067 - patches folder: no decrypts added to patcher folder
* -- no decrypts were created
chown: doolak: Invalid argument
2008-02-28 16:40:01.172 open[31345:10b] _CFGetHostUUIDString: unable to determine UUID for host. Error: 35
LSOpenFromURLSpec() failed with error -10810 for the file /Users/doolak/Desktop/AMD.Patch.Folder/2008.02.28_at_16.29.

now i am not sure what to do... maybe somebody can help me?