Calendar not correctly displayed (2.5.1)

[jpfayolle]

Calendar is not displayed correctly with Firefox (version 31.0). Although, passing the mouse on the list display each item.
With IE10, all tasks are grouped at the same hour, so not really readable.
See attached photos.
OS: Win7 64bits

I did not find any way to configure the calendar UI to correct that.
Regards

[jpfayolle]

Please don't take in account previous post. After rebooting, I have it correctly displayed.
Maybe a problem of cache. Maybe it's necessary to stop/start all services after upgrading.

Regards

[yuri]

old css cached.