Could the adsense be designed more naturally with the thread layout? For example, with the same width as the message cell.
Adsense is fully customisable when requesting the code from google.
I presume it will be possible to get the required width or very close at least.
I will sign up to adsense however it maybe some time before I get approval.
I am just messing about with some different designs on my test server, adding it to a new row etc. I will update if I hit on anything that looks better.