Have you ever wondered why you have so many revisions on your wordpress blog. Do you feel like there are too many revisions per posts or pages? That can become over whelming and cause the data base to increase in size as your blog grows. Well the solution is to install revison control plugin and set it up according to your requirements. This will make your life much easier and your blog will not become cluttered with so many revisions. I have tested this plugin in my blog running wordpress version 3.0.1 and with the current plugins installed it runs smooth with no issues.
Try to install the plugin from the beginning of your blog if you have already started your blog then that is ok. The reason why I am saying this is because it is easier to troubleshoot any plugins clashing with other plugins from the beginning of your blog then later on when you have so many plugins added. Most important if you can have a second testing blog created then that would also make your life much simpler.
This is a very clean way of editing your database without having to login into your back-end and physically delete or remove some code from wordpress and or mysql database.
Hint: It is very important to backup your wordpress especially your database just in case something goes wrong.