If you’re heading up trunk and your theme isn’t completely knackered
it’s a good idea to check the log as you will get deprecation
warnings for your theme which you can fix.
For example:
**** Deprecation warning: full_html called from themes/yourtheme/
views/articles/_comment.rhtml:6:in
`_run_rhtml__themes_yourtheme_views_articles__comment’ use .html
instead ****
I thought that handy 
G