some problems about qt 4.8.0 and qtCreator 2.4.1

I have compiled qt 4.8.0 and qtCreator 2.4.1 from source using mingw on several PCs.

For the lastest mingw 4.6.1(32bit, downloaded using “mingw-get-inst-20111118” tool from www.mingw.org), Win7 sp1 ×64, WinXP pro sp3 ×86 and Win2003 sp2 ×86 were used as the OS to compile the source of qt 4.8.0 and qtCreator 2.4.1.

After sucessful compilation in three platforms (with deal with few errors), there are some problems when runing.

1. designer crashes on both WinXP and Win2003, while works fine under win7 ×64. ( the error dialog seems show the access violation with msvcrt.dll (version 7.0.2600.5512 on WinXP) )

2. qtCreator works fine, except crashes when click on “options”->“disigner” tab under WinXP and Win2003.

3. gdb shipped with mingw 4.6.1 can not work properly, in all cases breakpoint were ignored. as table 1 shows.

For mingw 4.4.0 bundled in old Qt IDE (2010.05) , all works fine, except the gdb, shown in Table 2.

here are gdb version info, bundled with mingw 4.4.0 from old Qt IDE (2010.05)
~“GNU gdb (GDB) 7.1.0.20100329-cvs\n”
~“Copyright © 2010 Free Software Foundation, Inc.\n”
~“License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n”
~“This is free software: you are free to change and redistribute it.\n”
~“There is NO WARRANTY, to the extent permitted by law. Type \“show copying\”\n”
~“and \“show warranty\” for details.\n”
~“This GDB was configured as \“i686-pc-mingw32\”.\n”
~“For bug reporting instructions, please see:\n”
~”<http://www.gnu.org/software/gdb/bugs/>.\n”

My question is how to setup a proper IDE to make the gdb and designer work fine?

debug logs [pastebin.com] when gdb crashed (mingw 4.4.0)