May 23, 2013
Google has released a new version, 27.0.1453.94, of its Chrome browser; this update is only for Windows, and fixes a Graphics processing (GPU) bug that can cause a crash. (I am not aware of any security consequences of this bug.) Further details are available via the Release Announcement.
Windows users should get the new version via the built-in update mechanism.
April 15, 2013
Google recently announced that it has released a new version, 26.0.1410.65, of its Chrome browser, only for Mac OS X. The update, according to the Release Announcement, fixes a bug related to WebGL. You should get the update automatically; I don’t think there’s any reason to rush to get it, since the bug it fixes doesn’t appear to have security implications.