We've released rc1 of our next desktop release, 2.3.2.
It's a bugfix release, you are encouraged to update.
Changes and Download: https://owncloud.org/changelog/desktop/
We also have a "testpilotcloud" branding that uses a separate configuration directory and does not interfere with your normal client installation: See the links on the right side here: https://owncloud.org/install/#testing-development
PS: If you want to contribute, ping us on IRC on freenode: #owncloud-client-dev