Sourceforge is upgrading their services, and requires us to move on to the new one, that will not break anything and everything should be fine, and all data migrated (please, cross your fingers!).
The only problem is the SVN, that will require a new URL and that break all script, automation and of course, all developers will need to do a checkout and work with the new one. The old one will be there, BUT will not be used anymore. This really can confuse some of us not well informed about this, resulting on some people committing to old SVN and some other people committing to the new one. This is very nasty (I have experienced it on other projects!).
I don't have a date for the change (we are in the queue), my idea is to release 4.1 version AND move to the new system, that I will hope could be 2-3 weeks, no more.