Rebrand? Why?

I was going to rant about rebranding and show you a pile of terrible logo's but I'll let you go and decide for yourself

I thought I'd start with a disappointment though, Adobe should have done better than that... Brand New is a great blog dissecting logo's before and after rebrands. Some of them look good just because their old logo looks terribly out of date, some just leave you thinking why did you bother?