I observed something annoying.
I am actually working on the css file.
For example, I change the h1 tag in order to have smaller caracter and I also added a temporary border for debuging.
When I refresh the page the changes are not shown. But sometime later, the changes was applyed.
I make new change, and it happen again.
From Administration menu, I clear the cache but it did not help.
I wonder why the CSS changes seams to be cache somewhere. Is there another way then deleting the folder /core/cache, if that is the solution?
Thanks and good evening