Bad inactive tab corner appearance on hover in Thunderbird 15 with Ambiance

[Christopher Kyle Horton]

After upgrading to Thunderbird 15 (with the new tabs style) on my Ubuntu 12.04 LTS desktop today, I noticed that if you hover over the inactive tabs and the default Ambiance theme is set, there is a distinct vertical border which appears between the center of the tabs and the corners, instead of a smooth and continuous look. The active tab and tabs which are not hovered over are not affected.

See attached screenshot for an example of how this looks.

Steps to reproduce:
1.) Open Thunderbird, and open multiple tabs (2 or more is fine). Make sure your current theme is Ambiance.
2.) Hover the mouse cursor over any tab other than the currently selected tab

My machine is running a fully up-to-date Ubuntu 12.04 LTS 64-bit, with thunderbird 15.0+build1-0ubuntu0.12.04.1 and the default Ambiance theme. AFAICT this does not occur with Radiance.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: thunderbird 15.0+build1-0ubuntu0.12.04.1
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic x86_64
AddonCompatCheckDisabled: False
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: christopher 2034 F.... pulseaudio
 /dev/snd/controlC1: christopher 2034 F.... pulseaudio
BuildID: 20120827103657
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'NVidia'/'HDA NVidia at 0xfe028000 irq 22'
   Mixer name : 'Realtek ALC883'
   Components : 'HDA:10ec0883,1458c601,00100002'
   Controls : 45
   Simple ctrls : 22
Card1.Amixer.info:
 Card hw:1 'U0x46d0x802'/'USB Device 0x46d:0x802 at usb-0000:00:02.1-4, high speed'
   Mixer name : 'USB Mixer'
   Components : 'USB046d:0802'
   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 - 6144
   Mono: Capture 6144 [100%] [30.00dB] [on]
Channel: Unavailable
Date: Fri Aug 31 23:56:08 2012
ForcedLayersAccel: False
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20111129.1)
IpRoute:
 default via 67.194.184.1 dev eth0 proto static
 67.194.184.0/23 dev eth0 proto kernel scope link src 67.194.184.17 metric 1
 169.254.0.0/16 dev eth0 scope link metric 1000
MostRecentCrashID: bp-69e595f8-f684-444b-ba96-3b46c2120202
Prefs:
 extensions.lastAppVersion: "15.0" (prefs.js)
 network.cookie.prefsMigrated: true (prefs.js)
 places.database.lastMaintenance: 1346470320 (prefs.js)
 places.history.expiration.transient_current_max_pages: 97076 (prefs.js)
 places.history.expiration.transient_optimal_database_size: 155323924 (prefs.js)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=15.0/20120827103657
RelatedPackageVersions:
 google-talkplugin 3.5.1.0-1
 rhythmbox-mozilla 2.96-0ubuntu4.1
 gnome-shell 3.4.1-0ubuntu2
 totem-mozilla 3.0.1-0ubuntu21
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
RunningIncompatibleAddons: False
SourcePackage: thunderbird
SubmittedCrashIDs: bp-69e595f8-f684-444b-ba96-3b46c2120202
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/03/2009
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F6
dmi.board.name: M61PME-S2P
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.:bvrF6:bd11/03/2009:svnGigabyteTechnologyCo.,Ltd.:pnM61PME-S2P:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnM61PME-S2P:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: M61PME-S2P
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

[Christopher Kyle Horton (christhehorton)]

I found that this same issue also appears when using Salience, a third-party GTK theme. Maybe any GTK theme with dark toolbars would be sufficient for triggering this bug...?

[Chris Coulson (chrisccoulson)]

Hi,

I'm actually in Warsaw this weekend with the person who worked on the new theme. I showed this to him, and he asked if it changes at all if you resize the window (ie, if you shrink the window until the tab size changes)?

[Christopher Kyle Horton (christhehorton)]

Hello Chris,

I have tried changing the window size in Thunderbird to make the tab size change, but that doesn't happen. The issue still appears, however. See attached screenshot (with three tabs open).

Also worth noting is that I installed Ubuntu 12.10 from a daily build on my laptop (a different machine) a couple days ago, and I cannot reproduce this bug there. So, this looks specific to Precise to me.

[gf (gf-interlinks-deactivatedaccount)]

Hello Christopher,
Thank you for submitting this bug and reporting a problem with Thunderbird.

You made this bug report in 2012 and there have been several versions of Ubuntu and Thunderbird since then.

Could you confirm that this is no longer a problem and that we can close the ticket?
Or, if it is still a problem, could you run the following (only once):
apport-collect BUGNUMBER

and upload the updated logs and and any other logs that are relevant for this particular issue.

Thank you again for helping make Ubuntu and Thunderbird better.

G

[Launchpad Janitor (janitor)]

[Expired for thunderbird (Ubuntu) because there has been no activity for 60 days.]