Note: Having switched to a different combination (kicked GoogleEnhancer etc. and use http://userscripts.org/scripts/show/9310 now), I do no longer maintain this UserStyle. If you want to follow-up, take a look at http://freestyler.ws/style/89798/google-compact-for-googlemonkeyr – which is based on this one and optimized to work smoothly with GoogleMonkeyR.

If you use GoogleEnhancer, you may want to disable the website preview. Otherwise it will be displayed on top of the search results without problems. But do not enable "Classic" with GoogleEnhancer, as this converts everything to a table and half of this style won't work correctly. As classic is a combination of "switch off website preview" and "disable instant search", I recommend doing the first with GoogleEnhancer, and the latter in the Google Search settings (yes, that also works without being logged in).

History:
1.0.7.5 - excluding some ads
1.0.7.0 - some adjustments concerning site changes.
1.0.6.0 - some finetuning after GoogleEnhancer adjusted its placements as well - and better use of available space
1.0.5.0 - Rollout of the new design seems to have some changes - adjusted again.
1.0.4.0 - Google changed the design of the search pages - trying to keep up with it ;)
1.0.3.0 - hide Google + FilterTechnics impressum (bottom of page); adapted for more google sites
1.0.2.1 - make "related searches" span both columns (i.e. full width) again
1.0.2.0 - included images.google.* with special adaptions