not an hardware expert by any means but i remember reading somewhere that Smartreflex shouldn't be used with freqencies above 850MHz is it (was it?) turned on for you?
So, just did complete a reflash. Went to DMO & grabbed FAM. Installed power kernel & tools, qcpufreq, & conky. Cranked the cpu up to 1150, left Smartreflex off. Started installing stuff and checked conky to see it actually hitting full speed. Seems stable so far. Sweet!