On Fedora 16 i686, in QtCreator development version, running debugger (regardless of breakpoints) results in an error: "The inferior stopped because it received a signal from the Operating System.

Signal name: SIGSTOP
Signal meaning: Stopped (signal)"

This did not occur in 2.4.0 and in mid-December builds.

After that, "Diassembler (_start)" is shown as active document and it reads:
0x473592b0 <+0x0000> mov %esp,%eax
0x473592b2 <+0x0002> call 0x4735d5a0 <_dl_start>