G'day, as the subject line says, it happens in Safari, Camino, Firefox and Icab.

When I try to move down a street by double-clicking that circular thingey, each browser has crashed/quit.

I'm running a PowerMac G5, dual 2 GHz, Mac OS X 10.4.11 with 4.5 GB RAM.

Recent changes have been the reformatting of my hard disk and fresh intallation of the OS and apps.

Any ideas?

Try reinstalling flash I'm pretty sure streetview uses it or another plugin.

... that worked nicely.