Clicking and dragging image in eye of gnome crashes X

If I open any image with eog (I tried several different .png and .svg files), then click and drag with the left mouse button inside the window, X immediately crashes and I get taken back to the login screen. If no image file is open, nothing happens. I'm running 64-bit Ubuntu 12.04, fully updated, on a Dell Inspiron 15R 5520 laptop with an AMD Radeon HD 7600M graphics card and the official 64-bit AMD driver (not sure how to tell which version - it was the latest a couple of months ago anyway). /var/log/Xorg.0.log.old contains the following backtrace, which I assume is the relevant one:

[ 37534.034] (II) fglrx(0): EDID vendor "LGD", prod id 826
[ 37534.034] (II) fglrx(0): Printing DDC gathered Modelines:
[ 37534.034] (II) fglrx(0): Modeline "1366x768"x0.0 76.50 1366 1402 1450 1546 768 771 776 824 -hsync -vsync (49.5 kHz)
[ 37534.034] (II) fglrx(0): Modeline "1366x768"x0.0 51.00 1366 1402 1450 1564 768 771 776 814 -hsync -vsync (32.6 kHz)
[ 37534.113] (II) fglrx(0): EDID vendor "LGD", prod id 826
[ 37534.113] (II) fglrx(0): Printing DDC gathered Modelines:
[ 37534.113] (II) fglrx(0): Modeline "1366x768"x0.0 76.50 1366 1402 1450 1546 768 771 776 824 -hsync -vsync (49.5 kHz)
[ 37534.113] (II) fglrx(0): Modeline "1366x768"x0.0 51.00 1366 1402 1450 1564 768 771 776 814 -hsync -vsync (32.6 kHz)
[ 37536.071] (II) XKB: reuse xkmfile /var/lib/xkb/server-4E634B280B0E5C069EA80E39EF9080F0A8FC0600.xkm
[ 37554.682] (II) fglrx(0): EDID vendor "LGD", prod id 826
[ 37554.682] (II) fglrx(0): Printing DDC gathered Modelines:
[ 37554.682] (II) fglrx(0): Modeline "1366x768"x0.0 76.50 1366 1402 1450 1546 768 771 776 824 -hsync -vsync (49.5 kHz)
[ 37554.682] (II) fglrx(0): Modeline "1366x768"x0.0 51.00 1366 1402 1450 1564 768 771 776 814 -hsync -vsync (32.6 kHz)
[ 41235.982] (II) fglrx(0): EDID vendor "LGD", prod id 826
[ 41235.982] (II) fglrx(0): Printing DDC gathered Modelines:
[ 41235.982] (II) fglrx(0): Modeline "1366x768"x0.0 76.50 1366 1402 1450 1546 768 771 776 824 -hsync -vsync (49.5 kHz)
[ 41235.982] (II) fglrx(0): Modeline "1366x768"x0.0 51.00 1366 1402 1450 1564 768 771 776 814 -hsync -vsync (32.6 kHz)
[ 49260.131]
Backtrace:
[ 49260.131] 0: /usr/bin/X (xorg_backtrace+0x26) [0x7f96c3ba2876]
[ 49260.131] 1: /usr/bin/X (0x7f96c3a1a000+0x18c71a) [0x7f96c3ba671a]
[ 49260.131] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f96c2d40000+0xfcb0) [0x7f96c2d4fcb0]
[ 49260.131] 3: /usr/bin/X (miResolveColor+0x3) [0x7f96c3b7fda3]
[ 49260.131] 4: /usr/bin/X (FakeAllocColor+0x62) [0x7f96c3a5ab72]
[ 49260.131] 5: /usr/bin/X (0x7f96c3a1a000+0x1779d8) [0x7f96c3b919d8]
[ 49260.131] 6: /usr/bin/X (0x7f96c3a1a000+0x1797c1) [0x7f96c3b937c1]
[ 49260.131] 7: /usr/bin/X (miPointerUpdateSprite+0x29d) [0x7f96c3b8d93d]
[ 49260.131] 8: /usr/bin/X (0x7f96c3a1a000+0x173c2d) [0x7f96c3b8dc2d]
[ 49260.131] 9: /usr/bin/X (0x7f96c3a1a000+0xdb9f9) [0x7f96c3af59f9]
[ 49260.131] 10: /usr/bin/X (0x7f96c3a1a000+0x1119ca) [0x7f96c3b2b9ca]
[ 49260.131] 11: /usr/bin/X (0x7f96c3a1a000+0x560a9) [0x7f96c3a700a9]
[ 49260.131] 12: /usr/bin/X (0x7f96c3a1a000+0x5e7a7) [0x7f96c3a787a7]
[ 49260.131] 13: /usr/bin/X (0x7f96c3a1a000+0x58000) [0x7f96c3a72000]
[ 49260.131] 14: /usr/bin/X (0x7f96c3a1a000+0x126caa) [0x7f96c3b40caa]
[ 49260.132] 15: /usr/bin/X (0x7f96c3a1a000+0x4e8a1) [0x7f96c3a688a1]
[ 49260.132] 16: /usr/bin/X (0x7f96c3a1a000+0x3d7ba) [0x7f96c3a577ba]
[ 49260.132] 17: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7f96c1bd176d]
[ 49260.132] 18: /usr/bin/X (0x7f96c3a1a000+0x3daad) [0x7f96c3a57aad]
[ 49260.132] Segmentation fault at address 0x7f86c55810e6
[ 49260.132]
Caught signal 11 (Segmentation fault). Server aborting
[ 49260.132]
Please consult the The X.Org Foundation support
  at http://wiki.x.org
 for help.
[ 49260.132] Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 49260.132]
[ 49260.177] (II) evdev: Power Button: Close
[ 49260.177] (II) UnloadModule: "evdev"
[ 49260.177] (II) Unloading evdev
[ 49260.178] (II) evdev: Video Bus: Close
[ 49260.178] (II) UnloadModule: "evdev"
[ 49260.178] (II) Unloading evdev
[ 49260.181] (II) evdev: Power Button: Close
[ 49260.181] (II) UnloadModule: "evdev"
[ 49260.181] (II) Unloading evdev
[ 49260.185] (II) evdev: Video Bus: Close
[ 49260.185] (II) UnloadModule: "evdev"
[ 49260.185] (II) Unloading evdev
[ 49260.193] (II) evdev: Laptop_Integrated_Webcam_HD: Close
[ 49260.193] (II) UnloadModule: "evdev"
[ 49260.193] (II) Unloading evdev
[ 49260.194] (II) evdev: AT Translated Set 2 keyboard: Close
[ 49260.194] (II) UnloadModule: "evdev"
[ 49260.194] (II) Unloading evdev
[ 49260.212] (II) UnloadModule: "synaptics"
[ 49260.212] (II) Unloading synaptics
[ 49260.308] (II) evdev: Dell WMI hotkeys: Close
[ 49260.309] (II) UnloadModule: "evdev"
[ 49260.309] (II) Unloading evdev
[ 49260.310] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 49260.341] (II) fglrx(0): Backup framebuffer data.
[ 49260.519] (II) fglrx(0): Backup complete.
[ 49260.676] ddxSigGiveUp: Closing log
[ 49260.676] Server terminated with error (1). Closing log file.