diff -up ltrace-0.5-64/process_event.c\~ ltrace-0.5-64/process_event.c
--- ltrace-0.5-64/process_event.c~	2011-11-09 12:01:06.000000000 +0100
+++ ltrace-0.5-64/process_event.c	2011-11-09 13:29:28.000000000 +0100
@@ -448,7 +448,7 @@ static void process_breakpoint(struct ev
 			unsigned long a;
 			struct library_symbol *libsym =
 			    event->proc->callstack[i].c_un.libfunc;
-			void *addr = sym2addr(leader, libsym);
+			void *addr = sym2addr(event->proc, libsym);
 
 			if (libsym->plt_type != LS_TOPLT_POINT) {
 				unsigned char break_insn[] = BREAKPOINT_VALUE;
@@ -509,7 +509,7 @@ static void process_breakpoint(struct ev
 		if (event->proc->need_to_reinitialize_breakpoints
 		    && (strcmp(sbp->libsym->name, PLTs_initialized_by_here) ==
 			0))
-			reinitialize_breakpoints(leader);
+			reinitialize_breakpoints(event->proc);
 #endif
 
 		continue_after_breakpoint(event->proc, sbp);

Diff finished.  Wed Nov  9 13:32:50 2011