The Document structure pane in PP4 freezes when I try to delete a style.
If I select a style that is still used in the document, a dialogue box opens inviting me to either 'replace all references with another style' or 'delete all elements'.
I select 'delete all elements' and click ok.
The Document structure pane freezes. Opening and closing the pane just shows a grey pane. Refreshing has no effect. The only way I found to get it back is close the program and restart.