- Patch #302763 by Dave Reid, Rob Loach: replace time() by ['REQUEST_TIME'] as per Rasmus' suggestion.  Removed drupal_referrer() for consistency.

- Patch #225450 by Crell, chx, bjaspan, catch, swentel, recidive et al: next generation database layer for Drupal 7.

- Patch #277440 by R.Muilwijk: fixed bug caching integers and doubles.  Fixes 2 of the 3 failing cache tests.

- Patch #245115 by kkaefer, John Morahan, JohnAlbin et al: after a long discussion we've decided to make the concatenation operator consistent with the other operators.

#215252 by bdragon: reset the cache flush variable before the cache is flushed, so busy sites will not attempt multiple cache flushes at a time

#195202 by pwolanin: clear block cache before page cache, so stale data will not end up in the cache

noted by Robert Douglass in his caching presentation: the key param to cache_get should be renamed to cid for consistency (all other functions have cid)

#136837 by meba: PHP replaces {} enclosed variables in strings with the variable value itself, so cache tables were not prefixable

- Patch #137415 by slantview: simplified the cache API/usages, and made it a tad smarter.  Makes it easier to program for, and easier to replace.  Will need to be documented.