This isn't a Thunderbird bug then :) Thunderbird, like most applications, uses gio to look up protocol handlers. In 11.04, this lookup was delegated to gvfs which looked up the handlers from some keys in gconf. In 11.10, glib was changed so that gio uses the same mechanism that already exists for looking up mimetype handlers (eg, desktop files), using the x-scheme-handler types for protocol handlers.
It looks like your configuration tool hasn't been updated for the glib changes, else there would be a "x-scheme-handler/http=chromium- browser.desktop" in the "[Default Applications]" section of your mimeapps.list ** Tags added: needs-reassignment -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/922264 Title: default browser has changed, but not for thunderbird (and prefers firefox?) Status in “thunderbird” package in Ubuntu: Incomplete Bug description: I am using Xubuntu, Firefox had been the default browser. Since using Chromium as my default browser (Firefox has not been uninstalled), Thunderbird still uses Firefox as the default browser. How do I know what's my default browser? Chromium asked/told me. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: thunderbird 8.0+build1-0ubuntu0.11.10.1 ProcVersionSignature: Ubuntu 3.0.0-15.25-generic-pae 3.0.13 Uname: Linux 3.0.0-15-generic-pae i686 NonfreeKernelModules: fglrx AddonCompatCheckDisabled: False AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.23-0ubuntu4 Architecture: i386 BuildID: 20111124200334 CRDA: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden Card0.Amixer.info: Card hw:0 'SB'/'HDA ATI SB at 0xfe024000 irq 16' Mixer name : 'Realtek ALC889A' Components : 'HDA:10ec0885,1458a002,00100101' Controls : 39 Simple ctrls : 22 Card1.Amixer.info: Card hw:1 'U0x4710x308'/'USB Device 0x471:0x308 at usb-0000:00:12.0-1, full speed' Mixer name : 'USB Mixer' Components : 'USB0471:0308' Controls : 2 Simple ctrls : 1 Card1.Amixer.values: Simple mixer control 'Mic',0 Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum Capture channels: Mono Limits: Capture 0 - 3 Mono: Capture 0 [0%] [26.00dB] [on] Card2.Amixer.info: Card hw:2 'Audiophile192'/'M Audio Audiophile192 at 0xcf00, irq 21' Mixer name : 'ICE1724 - multitrack' Components : '' Controls : 15 Simple ctrls : 10 Card3.Amixer.info: Card hw:3 'HDMI'/'HDA ATI HDMI at 0xfdffc000 irq 19' Mixer name : 'ATI RS690/780 HDMI' Components : 'HDA:1002791a,00791a00,00100000' Controls : 4 Simple ctrls : 1 Card3.Amixer.values: Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Channel: release Date: Thu Jan 26 20:22:56 2012 DefaultProfilePlugins: Shockwave Flash - Lib=libflashplayer.so, Location=/usr/lib/flashplugin-installer IcedTea-Web Plugin (using IcedTea-Web 1.1.3 (1.1.3-1ubuntu1.1)) - Lib=IcedTeaPlugin.so, Location=/usr/lib/jvm/java-6-openjdk/jre/lib/i386 ForcedLayersAccel: False IfupdownConfig: auto lo iface lo inet loopback InstallationMedia: Xubuntu 11.04 "Natty Narwhal" - Release i386 (20110427) IpRoute: default via 192.168.91.191 dev eth0 proto static 169.254.0.0/16 dev eth0 scope link metric 1000 192.168.91.0/24 dev eth0 proto kernel scope link src 192.168.91.101 metric 1 IwConfig: lo no wireless extensions. eth0 no wireless extensions. Profile1Plugins: Shockwave Flash - Lib=libflashplayer.so, Location=/usr/lib/flashplugin-installer IcedTea-Web Plugin (using IcedTea-Web 1.1.3 (1.1.3-1ubuntu1.1)) - Lib=IcedTeaPlugin.so, Location=/usr/lib/jvm/java-6-openjdk/jre/lib/i386 Profile2Plugins: Shockwave Flash - Lib=libflashplayer.so, Location=/usr/lib/flashplugin-installer IcedTea-Web Plugin (using IcedTea-Web 1.1.3 (1.1.3-1ubuntu1.1)) - Lib=IcedTeaPlugin.so, Location=/usr/lib/jvm/java-6-openjdk/jre/lib/i386 Profile2Prefs: extensions.lastAppVersion - 8.0 network.cookie.prefsMigrated - true Profiles: Profile0 (Default) - LastVersion=8.0/20111124200334 (Running) Profile1 - LastVersion=8.0/20111124200334 Profile2 - LastVersion=8.0/20111124200334 RfKill: RunningIncompatibleAddons: False SourcePackage: thunderbird UpgradeStatus: Upgraded to oneiric on 2012-01-07 (18 days ago) dmi.bios.date: 07/12/2010 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: FDf dmi.board.name: GA-MA78G-DS3H dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrFDf:bd07/12/2010:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA78G-DS3H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA78G-DS3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-MA78G-DS3H dmi.sys.vendor: Gigabyte Technology Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/922264/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

