Blank page in OpenERP after module install
I had same experience like yours. I think most of the time this happened because of a permission issue for certain files or database issue. 
You cannot drop database on a production environment right?. So best way to solve it is removed last updated module source from addon folder and restart the odoo service. 
Then update your addon source from working copy and install them.
Maybe someone could help me.
I've installed Odoo (OpenERP) on localhost and I've installed many basic modules (15). I have a problem, after install Expense Tracker module the web client displays a blank page, in any section. I can't see also the Settings page, just the menu bar at the top.
If I install just the Expense Tracker, it works. So it isn't a module problem.
Thank you! :)