my version
Version: master
SCM Revision: 2.0.7
Compiler: Clang 6.0.0
Qt Version: 5.4.0
Compiled on: Jan 3 2015
i found a solution !!!!i explain when i start my project i changed "general factor" and "general scale"
when i copy/paste the text size is very very little, in fact the text became at factor and scale 0,1 (it seems). BUT if i go to drawing preference and just clic on Ok in the window (no change), the size become normal !
why ? i don't known, maybe with yosemite (mac computer) there is a bugg.
anyway it's work ! i can make many copy and many paste. and at the end i can change the size of my dimension.
that's great
Thanks lot for your help !