Chinese characters scramble after a while

The problem I am currently facing is that the Chinese characters that are posted on my site which are encoded with UTF-8 become scrambled for some reason overnight (I check the next morning). All my pages on the application are headed with <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> I attempted to use the solution provided on this page http://www.artweb-design.de/2007/3/10/server-setup-mistakes-character-encoding but it did not fix the problem.

Also, these Chinese characters are details, which I store in a DB2 database which has code set to UTF-8, and are grabbed from the database when a user visits the page displaying the information. So based on this I suspect that the problem lies with how the data is grabbed from the database to the server(just a guess). The versions I am using are: ruby 1.8.7 rails 1.2.6 mongrel 1.1.3

In my database.yml file the encoding is set to utf8