Confirmed with revision 3505 (Ubuntu Edgy, wxGTK 2.6.3p2).

confirmed SVN 3590 Ubuntu Edgy
 Here is a small pgm that can reproduce the error.
 Place a breakpoint on the strcpy statement, run the pgm to the breakpoint, then keep double clicking on on the breakpoint.
Pgm will crash, backtrace is not consistent. Sometimes it shows a callback to a null address, sometimes corrupted memory.

// ----------------------------------------------------------------


(codeblocks:1575): GLib-WARNING **: gmain.c:1429: ref_count == 0, but source is still attached to a context!

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1230645584 (LWP 1575)]
0xb6c51d67 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
(gdb) bt
#0  0xb6c51d67 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#1  0xb6c524a5 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#2  0xb6c52b89 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#3  0xb6fc6574 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#4  0xb7baef9b in wxEventLoop::Run () from /usr/lib/libwx_gtk2u_core-2.6.so.0
#5  0xb7c482be in wxAppBase::MainLoop ()
   from /usr/lib/libwx_gtk2u_core-2.6.so.0
#6  0xb7c47981 in wxAppBase::OnRun () from /usr/lib/libwx_gtk2u_core-2.6.so.0
#7  0x080706aa in CodeBlocksApp::OnRun (this=0x81231b0)
    at /home/pecan/devel/trunk/src/src/app.cpp:593
#8  0xb79c4f1a in wxEntry () from /usr/lib/libwx_baseu-2.6.so.0
#9  0xb79c4fc6 in wxEntry () from /usr/lib/libwx_baseu-2.6.so.0
#10 0x0806fd6e in main (argc=1, argv=0xbf92f364)
    at /home/pecan/devel/trunk/src/src/app.cpp:189
(gdb)


// ---------------------------------------------------------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1230707024 (LWP 3319)]
0xffffffff in ?? ()
(gdb) bt
#0  0xffffffff in ?? ()
#1  0xb6c3fc74 in g_source_set_callback () from /usr/lib/libglib-2.0.so.0
#2  0xb6c40561 in g_source_unref () from /usr/lib/libglib-2.0.so.0
#3  0xb6c4099d in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#4  0xb6c437df in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#5  0xb6c43b89 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#6  0xb6fb7574 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#7  0xb7b9ff9b in wxEventLoop::Run () from /usr/lib/libwx_gtk2u_core-2.6.so.0
#8  0xb7c392be in wxAppBase::MainLoop ()
   from /usr/lib/libwx_gtk2u_core-2.6.so.0
#9  0xb7c38981 in wxAppBase::OnRun () from /usr/lib/libwx_gtk2u_core-2.6.so.0
#10 0x080706aa in CodeBlocksApp::OnRun (this=0x81231b0)
    at /home/pecan/devel/trunk/src/src/app.cpp:593
#11 0xb79b5f1a in wxEntry () from /usr/lib/libwx_baseu-2.6.so.0
#12 0xb79b5fc6 in wxEntry () from /usr/lib/libwx_baseu-2.6.so.0
#13 0x0806fd6e in main (argc=1, argv=0xbfe26844)
    at /home/pecan/devel/trunk/src/src/app.cpp:189
(

// --------------------------------------------------------
// Test program
// --------------------------------------------------------
#include <iostream>
#include <cstdlib>
#include <cstring>

using namespace std;

int upstring(char *value);


int main()
{
    //asm("int3");
	char value[81]={'\0'};
	int upper_count;

	// perform i/o operation
	do
    {   cout << "Please type in a String (max. 80 characters): ";
        //cin.getline(value, 80);
        strcpy(value,"FakeReply");
        upper_count = upstring(value);
        cout << upper_count << " characters are converted" << endl;
        cout << "The new string is now: " << value << endl;
        if ( (strlen(value) >3) && (0==strncmp(value,"LOOP",4) ))
            break;
    }while(upper_count);

    // perform infinite loop if user entered text "loop"
    if ( (strlen(value) >3) && (0==strncmp(value,"LOOP",4)) )
    {
        int i = 0;
        while(true){
            cout<<".";cout.flush();
            ++i;
            sleep(1);
        }
    }
  return EXIT_SUCCESS;
}

int upstring(char *value)
{
  int i=0;
  while(*value)
  {
    if(islower(*value))
    {
      *value=toupper(*value);
      i++;
    }
  value++;
  }
  return(i);
}

Does this bug still persist?