I’m happy. 
We can now do dynamic texts with Blender 2.5.
But how to do a multilines text ? If I add, with Python a "
", it doesn’t work. 
Mmh…It worked in 2.49…It may be a bug…
Have I to report it on the Bug tracker ? Or is it normal ?
I think, you should report it. I m using multiline text in one of my games.
I tested with a new SVN and this bug was corrected. 