There seems to be a (IMO)bug upon starting this new version. There is a dark bar(a toolbar?) that comes up above the tab bar that is black, and either has the name of the web site in it followed by '- Iron' or the dark bar just says 'untitled - Iron'. The black bar is only in the strip that is used to drag the window around the screen when the initial page is loading. It happens for standard and incognito modes.
I know it is nothing to worry about, but it is disconcerting.
Is it part of 'bling'? Or What?
PS>> And yes, it happens with a new clean profile.
Yes, thats a bug we will fix soon, but you are right: This build is based on Chromium 27. Thats also the reason for the delay: The original Chromium 26 Stable source seems to have some bugs we could not fix in a matter of time so we switched (for this build) to 27 which runs much better.