WP Finance 1.2.0 released a bit earlier and soon after some bugs were discovered. Current version is bumped to 1.2.2 and should work as expected on all platforms. If you encounter any bugs, there is a special thread on wordpress support forum. You can list all the bugs there or simply email us wpfinance[at]mindomobile.com.
There is not much improvements visible for end user, main reason for that 1.2.x was released to update its backend code base and solve complex update issues that were present in 1.1.x branch. There is though some few improvements that should be visible for end user. First of all new configuration and help menus as well as minor financial report improvements. In 1.2.x we had to remove charts support as the library is outdated. The charts support should be brought in later releases.
Another issue you might encounter is the translations. As plugin core was completely rewritten we added some new text string that are not yet translated. You can submit your translations and we will push it as soon as possible to 1.2.x branch.
There are some more improvements lined up so stay tunned.