Although more often than not I use the DBE instead of the ABE, I've been noticing that every once in a while, when I use the ABE, the "Selecting background regions" process takes over 20 minutes per channel. This is on a computer that is not top of the line (Win32 XP, 1GB RAM, Core2Duo) but still. What I find odd is that this is not always the case, sometimes it works fairly fast, then others...