[O] agenda mode overlapping dates

[Uwe Brauer]

Hi

Just to test I have the following entry in my diary

Mon 8:30-9:30   Project 1
Tue 8:30-9:30   Other data
Mon 8:30-9:30   Project 2

Then I use org-agenda and
v c

But nothing is really done. I don't see any effect of visualizing the
conflicting date Monday 8:30-9:30

What do I miss?