Hi Tiago, I understand completely and please also accept my apologies for the delay in responding to you – we do endeavour to have a 24hr response time (not counting weekends) and clearly this thread has slipped through the gaps.
You could actually remove the “bubble” completely if you edit your code. Also – you may well be aware of this – you can click through from the calendar to a list of events for a specific day. By default, the actual date (ie “17” for the 17th of a given month) provides this link.
Once again you could change things round so that all events listed in the grid square use this same link.
The best way to learn about this stuff is to read up on our Themer’s Guide and do some experimenting 🙂