Hmmm, I tried with both:

$ /Applications/Pd-0.43-0test4.app/Contents/MacOS/Pd -d 1
Pt_Start() called
blksize 64, advance 17

and 

$ /Applications/Pd-0.42-5.app/Contents/MacOS/Pd -d 1
Pt_Start() called

These aren't compiled myself but rather downloaded from - http://crca.ucsd.edu/~msp/software.html

I tried making several objects, connections etc... still no luck. Is there a certain debug level you have to be on? Trying 0...5 still didn't do anything. 

Errors are being logged though, like when I couldn't save it to a directory:

Tue Feb 22 17:06:45 Joe-Computer.local Pd[3185] <Error>: kCGErrorIllegalArgument: _CGSFindSharedWindow: WID 3870
Tue Feb 22 17:06:45 Joe-Computer.local Pd[3185] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
Tue Feb 22 17:06:45 Joe-Computer.local Pd[3185] <Error>: kCGErrorIllegalArgument: CGSGetWindowTags: Invalid window 0xf1e

Just not the commands :S

Thanks,
Joe

On 22 February 2011 16:18, Pedro Lopes <pedro.lopes@ist.utl.pt> wrote:
My version was compiled from source

pedro@io:~/Apps/pdfont/pure-data/bin$ ./pd -version
Pd-0.43.0 ("test3") compiled 22:43:36 Dec 26 2010

If I run the debug it shows many things, even mouse moves inside patches. 

.xa16b0f8.c coords .xa16b0f8.ta16b898R 246 183 278 183 278 200 246 200 246 183
.xa16b0f8.c itemconfigure .xa16b0f8.ta16b898R -dash -
.xa16b0f8.c select clear
.xa16b0f8.c icursor .xa16b0f8.ta16b898 0
.xa16b0f8.c focus .xa16b0f8.ta16b898

Probably its just garbage for your purpose, but its "output" :)