The last version of Google Chrome stable, version 220.127.116.119, was using an incorrect path for version 6 update 20 of Sun's Java plug-in. It was also, according to Google, significantly slower than the second-to-last update, version 18.104.22.1685. Both of those have been corrected in the current release.
The three security fixes address a cross-origin bypass in Google URL, memory corruption in HTML5 handling, and memory corruption in font handling. The first and third errors were discovered outside of Google and awarded $1,000 and $500, respectively, for participating in Google's ongoing security bug-finding contest.
The full changelog can be read here.