Look at this code:
\begin{frame}
\frametitle{Test}
\begin{itemize}
\item Item 1.
\item Item 2a.\pause Item 2b.
\item Item 3.
\end{itemize}
\end{frame}
I have \beamerdefaultoverlayspecification{<+->} activated.
What happens is not what I want. I want four slides such that in each slide a new item (or subitem) appears. What I get is four slides but only silde 1-2 and 4 like I want. Slide 3 looks like slide 2. So "Item 2b." is missing on slide 3.
How can this be solved?
\pausewith\uncover<+->{...}works like a charm.