xdebug not breaking in included php files

xdebug not breaking in included php files

I'm trying to get xdebug up and running in Eclipse. I'm that far that I'm
able to add breakpoints in php files. However, if I add breakpoints in
included php files then these breakpoints are never hit.
I already checked the log to check if the (case sensitive) path and line
number are passed correctly between Eclipse and xdebug. This seems fine.
When I add xdebug_break(); to functions in these included files, the
debugger sometimes break correctly but in other functions it does not have
any effect and execution continues.
ps: using xampp/eclipse on OSX.
Anyone?