The crash is for both drivers vesa and fbdev the same:

*** glibc detected *** ksplashx: double free or corruption (out): 0x0849f158 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6(+0x6b611)[0x270611]
/lib/tls/i686/cmov/libc.so.6(+0x6ce68)[0x271e68]
/lib/tls/i686/cmov/libc.so.6(cfree+0x6d)[0x274f2d]
/usr/lib/libX11.so.6(+0x22899)[0x8e2899]
ksplashx[0x8057841]
ksplashx[0x805a9cf]
ksplashx[0x804a805]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0x21bbd6]
ksplashx[0x804a641]
======= Memory map: ========
00110000-001f9000 r-xp 00000000 08:05 446        /usr/lib/libstdc++.so.6.0.13
001f9000-001fd000 r--p 000e9000 08:05 446        /usr/lib/libstdc++.so.6.0.13
001fd000-001fe000 rw-p 000ed000 08:05 446        /usr/lib/libstdc++.so.6.0.13
001fe000-00205000 rw-p 00000000 00:00 0
00205000-00352000 r-xp 00000000 08:05 159291     /lib/tls/i686/cmov/libc-2.11.1.so
00352000-00353000 ---p 0014d000 08:05 159291     /lib/tls/i686/cmov/libc-2.11.1.so
00353000-00355000 r--p 0014d000 08:05 159291     /lib/tls/i686/cmov/libc-2.11.1.so
00355000-00356000 rw-p 0014f000 08:05 159291     /lib/tls/i686/cmov/libc-2.11.1.so
00356000-00359000 rw-p 00000000 00:00 0
00359000-00375000 r-xp 00000000 08:05 1060       /lib/libgcc_s.so.1
00375000-00376000 r--p 0001b000 08:05 1060       /lib/libgcc_s.so.1
00376000-00377000 rw-p 0001c000 08:05 1060       /lib/libgcc_s.so.1
00377000-00379000 r-xp 00000000 08:05 1570       /usr/lib/libXau.so.6.0.0
00379000-0037a000 r--p 00001000 08:05 1570       /usr/lib/libXau.so.6.0.0
0037a000-0037b000 rw-p 00002000 08:05 1570       /usr/lib/libXau.so.6.0.0
00470000-00493000 r-xp 00000000 08:05 1057       /lib/libpng12.so.0.42.0
00493000-00494000 r--p 00022000 08:05 1057       /lib/libpng12.so.0.42.0
00494000-00495000 rw-p 00023000 08:05 1057       /lib/libpng12.so.0.42.0
0050b000-0052f000 r-xp 00000000 08:05 159484     /lib/tls/i686/cmov/libm-2.11.1.so
0052f000-00530000 r--p 00023000 08:05 159484     /lib/tls/i686/cmov/libm-2.11.1.so
00530000-00531000 rw-p 00024000 08:05 159484     /lib/tls/i686/cmov/libm-2.11.1.so
00610000-00612000 r-xp 00000000 08:05 159483     /lib/tls/i686/cmov/libdl-2.11.1.so
00612000-00613000 r--p 00001000 08:05 159483     /lib/tls/i686/cmov/libdl-2.11.1.so
00613000-00614000 rw-p 00002000 08:05 159483     /lib/tls/i686/cmov/libdl-2.11.1.so
008c0000-009d9000 r-xp 00000000 08:05 1607       /usr/lib/libX11.so.6.3.0
009d9000-009da000 r--p 00118000 08:05 1607       /usr/lib/libX11.so.6.3.0
009da000-009dc000 rw-p 00119000 08:05 1607       /usr/lib/libX11.so.6.3.0
009dc000-009dd000 rw-p 00000000 00:00 0
00a38000-00a3c000 r-xp 00000000 08:05 1603       /usr/lib/libXdmcp.so.6.0.0
00a3c000-00a3d000 r--p 00003000 08:05 1603       /usr/lib/libXdmcp.so.6.0.0
00a3d000-00a3e000 rw-p 00004000 08:05 1603       /usr/lib/libXdmcp.so.6.0.0
00aa3000-00abe000 r-xp 00000000 08:05 662        /lib/ld-2.11.1.so
00abe000-00abf000 r--p 0001a000 08:05 662        /lib/ld-2.11.1.so
00abf000-00ac0000 rw-p 0001b000 08:05 662        /lib/ld-2.11.1.so
00ad9000-00af1000 r-xp 00000000 08:05 1605       /usr/lib/libxcb.so.1.1.0
00af1000-00af2000 r--p 00017000 08:05 1605       /usr/lib/libxcb.so.1.1.0
00af2000-00af3000 rw-p 00018000 08:05 1605       /usr/lib/libxcb.so.1.1.0
00c79000-00c7b000 r-xp 00000000 08:05 4221       /usr/lib/libXinerama.so.1.0.0
00c7b000-00c7c000 r--p 00001000 08:05 4221       /usr/lib/libXinerama.so.1.0.0
00c7c000-00c7d000 rw-p 00002000 08:05 4221       /usr/lib/libXinerama.so.1.0.0
00d65000-00d78000 r-xp 00000000 08:05 519        /lib/libz.so.1.2.3.3
00d78000-00d79000 r--p 00012000 08:05 519        /lib/libz.so.1.2.3.3
00d79000-00d7a000 rw-p 00013000 08:05 519        /lib/libz.so.1.2.3.3
00e7d000-00e8b000 r-xp 00000000 08:05 1622       /usr/lib/libXext.so.6.4.0
00e8b000-00e8c000 r--p 0000d000 08:05 1622       /usr/lib/libXext.so.6.4.0
00e8c000-00e8d000 rw-p 0000e000 08:05 1622       /usr/lib/libXext.so.6.4.0
00f42000-00f43000 r-xp 00000000 00:00 0          [vdso]
08048000-08062000 r-xp 00000000 08:05 3618       /usr/bin/ksplashx
08062000-08063000 r--p 00019000 08:05 3618       /usr/bin/ksplashx
08063000-08064000 rw-p 0001a000 08:05 3618       /usr/bin/ksplashx
08064000-08066000 rw-p 00000000 00:00 0
0836e000-084c0000 rw-p 00000000 00:00 0          [heap]
b7300000-b7321000 rw-p 00000000 00:00 0
b7321000-b7400000 ---p 00000000 00:00 0
b7420000-b7725000 rw-p 00000000 00:00 0
b7738000-b773b000 rw-p 00000000 00:00 0
bfec0000-bfec7000 rw-p 00000000 00:00 0          [stack]