The Qt Charts 1.2.1 is a patch-level release containing 9 fixes which are listed in the README file included in the source package. We are currently working on the next release, which brings Polar and Box Plot charts and some API enhancements suggested by charts users.
We have made the Charts 1.2.1 release available to commercial Qt licensees through the Qt Customer Portal. The release team is working on a new SDK and therefore the Charts is not yet available through there yet. Stay tuned.