xml-google-maps plugin breaks wordpress admin.
It causes blank screen for the entire admin section. It breaks the admin section immediately after activation. The wordpress website frontend xml-google-maps sections will continue to work fine (i.e. the maps will show properly). The only way to get back into the admin is to rename the the xml-google-maps folder in the plugins folder - this deactivates the plugin so that you can get back into admin.
Other plugins in use include: Akismet, NextGEN Gallery, Viper's Video Quicktags, WP-PageNavi, wp-weather