If you are using cache-blocks these are not cleared by the current 3.0 stable release.
Grab the clearcache.sh from svn trunk or get it from here http://ez.no/developer/ez_publish_3/contributions/binshellclearcachesh_fix_to_clear_cacheblocks
This will ensure the cache block cache is cleared too..
Tony Wood : twitter.com/tonywood
Vision with Technology
Experts in eZ Publish consulting & development