Avant browser is just a shell for IE so it has all of it's shortcomings that I'm trying to avoid. It also has issues with plug ins when multiple tabs are open. Microsoft always has a version of it on CorpNet but I gave up on it. I'm back to Firebird since it is the newest and I have finally got the tabs working the way I want. It gets picky with some of the extensions.
I would love to see IE v7 released with no ActiveX and less of the crap that people are exploiting. I love the dynamic content that IE allows but I hate the exploits and locking the browser down just cripples it compared to what Firebird can do. *sigh*