* Note #49 in README.

README.mkdn

@@ -7,6 +7,7 @@
 * Runtime: [Node.js](http://nodejs.org/) (0.8+ preferred)
 * Services: [Redis](http://redis.io) (2.4+; fall-back to on-disk JSON storage if not present)
     * Multi-server is supported _only_ when running with Redis
+    * Note to Redis 2.2 users (e.g. on Ubuntu 12.04): Please disable the `timeout 300` setting in `/etc/redis.conf`, or upgrade to Redis 2.4+ if possible at all. For more details, see [#49](https://github.com/audreyt/ethercalc/issues/49#issuecomment-25331595).
 * Browsers tested: Safari, Chrome, Firefox, IE.
 * Integrated with content management systems:
     * [Socialtext](http://www.socialtext.com/)