Comment 26 for bug 258613

> You suspect that the software was designed to let the user drag an item to
> a different day, yet not change the day that the event takes place? Why
> don't other calendaring software operate in such an unintuitive manner?
> No, I suspect that this is a programming error. Even on the off-chance
> that this is by design, it is still a bug.

I absolutely agree with you that the application's behavior is a bug from most users' view (because obviously not consistent with what is expected).
Side note: I've experienced strange behavior concerning recurring events in other calendaring software as well ;-)

However, I can't tell if this behavior is "as designed", if it works differently than designed, or if this use case has not been designed at all, and now just happens to behave strangely.

But definitely the effect of the user's actions in this case is not what he would expect; I vote clearly for a more intuitive behavior.