Sometimes after system updates yes, read below...

I'm not using Nawcom's kernel, but I am patching my binaries. I would expect some updates may affect your install.

I have 2 SL installations one called "snow" 320gb in size, one called "repair" 40gb.

When I have run system update on my "snow" partition sometimes quicktime gets updated. Sometimes iphoto gets updated. When this happens it affects my running of garageband, idvd, iphoto, and quicktime.

I just repatch the binaries when this happens but it's only happened twice (once with iphoto update, then a couple weeks later with quicktime update.) on a side note, off topic a little, system update has replaced my kernel and replaced iousbfamily.kext with unusable versions on many occasions. so the "repair" partition has become a very handy tool for me and I suggest to anybody with expendable HD space to use "Carbon Copy Cloner" and clone their system down to a smaller (bootable) partition.

Yes I know you can use a thumb drive, and boot cds, and even distros to boot in, but IMHO it's nice to just have a working system right there when you need it. wtshtf