In using the Version River I have noticed some (at least what appears to me) to be bugs or shortcomings:
* Tabbing from field to field does not work.
* When entering a new passage in the passage field it tries to find a match and never does. When pressing return to confirm your entry and leave the "auto find" the river does not repopulate/recalculate.
* Entering Bible abbreviations in the Bible field very inconsistent and unpredictable (Logos may decide to enter some random Bible for you)
* Pressing enter to begin calculating the river works only after you have changed Bibles and even then it perpetually calculates until you click inside the Bible field again. And then, it may randomly replace a specified Bible with something else (I have noticed that it usually replaces a version with "top Bibles"). Additionally, there is no "blue arrow" to press to begin calculating as there is in the Windows version.
This is my experience on only one machine.