browsers crashing.

Since a recent upgrade, Opera and Chrome crash with error messages like the following:

[5913:5913:0724/111632.892713:ERROR:url_pattern_set.cc(287)] Invalid url pattern: chrome://startpage/*
[5913:5913:0724/111632.893319:ERROR:url_pattern_set.cc(287)] Invalid url pattern: chrome://startpage/*
[5913:5913:0724/111632.893340:ERROR:url_pattern_set.cc(287)] Invalid url pattern: chrome://startpage/*
[5913:5913:0724/111632.949431:ERROR:gpu_process_host.cc(1003)] GPU process exited unexpectedly: exit_code=11
[5913:5913:0724/111634.570938:ERROR:gpu_process_host.cc(1003)] GPU process exited unexpectedly: exit_code=11
[5913:5913:0724/111634.797936:ERROR:gpu_process_host.cc(1003)] GPU process exited unexpectedly: exit_code=11
[5913:5913:0724/111634.885915:ERROR:gpu_process_host.cc(1003)] GPU process exited unexpectedly: exit_code=11
[5913:5913:0724/111634.964606:ERROR:gpu_process_host.cc(1003)] GPU process exited unexpectedly: exit_code=11
[5913:5913:0724/111635.061134:ERROR:gpu_process_host.cc(1003)] GPU process exited unexpectedly: exit_code=11
[5913:5913:0724/111635.097287:ERROR:gpu_process_host.cc(1003)] GPU process exited unexpectedly: exit_code=11
[5913:5913:0724/111635.123620:ERROR:gpu_process_host.cc(1003)] GPU process exited unexpectedly: exit_code=11
[5913:5913:0724/111635.152647:ERROR:gpu_process_host.cc(1003)] GPU process exited unexpectedly: exit_code=11
[5913:5913:0724/111635.152668:FATAL:gpu_data_manager_impl_private.cc(449)] GPU process isn't usable. Goodbye.
[0724/111635.170732:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[0724/111635.170943:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[0724/111635.171043:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[0724/111635.172561:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[0724/111635.174294:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[0724/111635.179795:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[0724/111635.179899:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[0724/111635.180664:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[5959:5963:0724/111635.235886:ERROR:ssl_client_socket_impl.cc(881)] handshake failed; returned -1, SSL error code 1, n
et_error -3

Firefox works fine. I don't even know which package is at fault here. Any suggestions?

-Chris