I normally dock the Styles & Formatting panel on top of the Navigator panel along the right side of the window.  As of release 4.4.0.1, it looks like the f oStyles & Formatting panel is now using the sidebar instead. Now when I dock it above the Navigator window and restart the program, the sidebar will be positioned beside the Navigator panel instead of above it.  I'm marking this major because it's a major irritant to have a regression in the UI like this.  Of course, if bug 67230, which is almost a year and a halld, would get fixed then two panels wouldn't be needed as much and this wouldn't be such a big useability issue, but having two panels side-by-side takes up a lot of screen space.