I run a pretty big board using vb 3.8 - I like it, and I'm at (massive) pains to make a move to vb 4, I don't trust it at the moment, and the delays with rolling out upgrades have caused me stress and have held me and my community back, but my traffic is growing, and a few times recently the server has locked up as a result of load. But I've raised the issue of load in the past, and it's still an outstanding issue (although this has impressed me). But I'm wondering about links and seo - I use vbseo with my vbulletin installation for nice urls which are well established in Google. If I upgrade my site to xenforo, will all those links break, or is there some way to ensure users coming to an old thread will be directed to the new one (similarly for the crawlers). Genuinely apprecaite the work put in by you folks so far!