This bug was first reported to Google in early April, and still isn't fixed. There has been a lot of discussion on various news groups and in the bug itself. A fix is being worked on, but in the bug there is a reference to a command-line option that will work in the mean time. Start Chrome like this:
In Ubuntu, I have Chrome on the quick-launch bar, so I just right clicked on the icon, selected properties, and pasted this line into the "command" box.