I've had troubles in the past with iCab crashing. On System 7.6.1, the lastest version doesn't work, so it's back to 2.9.9, which has a PowerPC-specific build.
As Dan Palka of System7today.com advises, I turned off CSS style sheets in all my browsers (IE, Netscape and now iCab), and things are indeed quicker. AND ... iCab hasn't yet crashed. It is getting through to Blogger (and I will test on Movable Type, too).