hey photo, i installed tiger on the same model ibook with 640mb ram and it ran like utter crap... because what i didn't realize it till then was the HD was freakin dying have you run smartreporter (freeware) or another 3rd-party utility to check the HD? (disk utility and hardware utility disk are fickle) http://homepage.mac.com/julianmayer/ the reason i mention this is that since installing 10.4.1 to my firewire external and running off that i find ALL my applications, from MS Office to PS CS (1) load-time and overall performance has increased dramatically. ps... why do you run acrobat reader!? it's a dog, man. acrobat pro i can understand, but reader!? pss... ordered a new 12" today... parting ways with my 16-month-old 800. and... good luck, bud.