I think I found why (but how this could happen, not sure ) :
Scanning for plugins in /usr/local/lib/codeblocks/plugins
SDK version mismatch for MouseSap (1.11.13). Expecting 1.11.12
SDK version mismatch for cbKeyBinder (1.11.13). Expecting 1.11.12
SDK version mismatch for CodeSnippets (1.11.13). Expecting 1.11.12
SDK version mismatch for ScriptedWizard (1.11.13). Expecting 1.11.12
SDK version mismatch for lib_finder (1.11.13). Expecting 1.11.12
Plugin resource not found: libAligner.zip
SDK version mismatch for BYOGames (1.11.13). Expecting 1.11.12
SDK version mismatch for wxSmith (1.11.13). Expecting 1.11.12
SDK version mismatch for wxSmithMime (1.11.13). Expecting 1.11.12
SDK version mismatch for OpenFilesList (1.11.13). Expecting 1.11.12
SDK version mismatch for HelpPlugin (1.11.13). Expecting 1.11.12
SDK version mismatch for NassiShneidermanPlugin (1.11.13). Expecting 1.11.12
SDK version mismatch for HeaderFixup (1.11.13). Expecting 1.11.12
SDK version mismatch for AutoVersioning (1.11.13). Expecting 1.11.12
SDK version mismatch for cbDragScroll (1.11.13). Expecting 1.11.12
It seems that make clean, was no safety net, probably those darn pch/gch's again :-(