Google Chrome 5.0.375.55, available for Windows, Mac and Linux, addresses at least two “high risk” vulnerabilities and several security-related denial-of-service crashes.
Here’s the skinny, from Google’s advisory:
-  Medium-Risk: Canonicalize URLs closer to the Safe Browsing specification. Credit to Brett Wilson of the Chromium development community.
-  High-Risk: Possible URL bar spoofing via unload event handlers. Credit to Michal Zalewski, Google Security Team.
-  Medium-Risk: Memory error in Safe Browsing interaction. Credit to Google Chrome Security Team (SkyLined).
-  Medium-Risk: Bypass of whitelist-mode plugin blocker. Credit to Darin Fisher of the Chromium development community.
-  Medium-Risk: Memory error with drag + drop. Credit to kuzzcc.
In partnership with Adobe, Google plans to integrate Flash Player into the browser in a coming release.