The Stable and Beta channels of Chrome have been updated to 6.0.472.55 for Windows, Mac, and Linux. This version contains the following fixes:
[r58038] [r58039] Failures when using autocomplete (issue 51727, 52940)
[r58106] Default search engine settings wiped out (issue 10913)
Shift reload not working (issue 1906)
Windows
[r58190] Importing data from other browsers when chrome is set as default (bug 53655)
[r58288] Chrome can’t be made default browser when it already exists (bug 53656)
More details about additional changes are available in the svn revision log.