Chrome asks you to choose a Search engine
In the latest version of Chrome (6.0.472.0), just after the installation completes, you will be asked to Choose the search engine to be used in the Omnibox.
ie, Google / Yahoo / Bing ?
Remember, even the very old versions of Chrome, had an option to change the default Search engine for the Omnibox, but in this version, you will be asked in the very first time of using Chrome. Only that is the difference.
I am stilling facing problems with Chrome in Windows Vista. It is often crashing. Whoa !!