[JKT]

It is a well known issue with javascript and garbage collection (whatever that is). If OmniWeb is sucking CPU, perform a sample on the application in Activity Monitor and you will probably see a lot of output related to KJS (Konqueror Javascript). It is an issue with the current version of WebKit that OmniGroup are using and is due to be fixed once they update to a later version of WebKit. It's frustrating as this bug has been around ever since the first sp of 5.5, but it has improved a lot for me since then.