I just installed wp super cache, and it's pretty cool.
However, I'm using a Twitter plugin that checks for new tweets once in a while, and show them in my sidebar (on all pages).
What I'd like to do is to invalidate the cache each time that plugin finds new tweets. Invalidate the front page may be enough (having outdated tweets on post pages is not a big deal) but I'm thinking about invalidating everything.
Is there some PHP function calls I can add to the Twitter plugin to invalidate the cache?
Also, I have an other (not really related) question. There are 2 values for the expire time: wp-cache which is 1 hour by default, and wp super cache 6 hours by default. What's the difference between the two?