If I want to remove or block someone on my contact list via the steamoverlay the "gameoverlayui" process crashes. Popups in-game are still being displayed, but in the wrong corner (lower right corner instead of upper right corner in Dota 2).

I have this bug for a couple of years now, since I first started using Steam on Linux.

Console output:

assert_20151106225941_2.dmp[9192]: Uploading dump (out-of-process)
/tmp/dumps/assert_20151106225941_2.dmp
CCrossProcessPipe::BWrite wrote too few bytes: 32 (Broken pipe).  Continuing.
assert_20151106225941_2.dmp[9192]: Finished uploading minidump (out-of-process): success = yes
assert_20151106225941_2.dmp[9192]: response: Discarded=1
assert_20151106225941_2.dmp[9192]: file ''/tmp/dumps/assert_20151106225941_2.dmp'', upload yes: ''Discarded=1''

System information:

Processor Information:
    Vendor:  AuthenticAMD
    CPU Family:  0x10
    CPU Model:  0x4
    CPU Stepping:  0x3
    CPU Type:  0x0
    Speed:  3411 Mhz
    4 logical processors
    4 physical processors
    HyperThreading:  Unsupported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Unsupported
    SSE4a:  Supported
    SSE41:  Unsupported
    SSE42:  Unsupported

Network Information:
    Network Speed:  

Operating System Version:
    Ubuntu 12.04.5 LTS (64 bit)
    Kernel Name:  Linux
    Kernel Version:  3.2.0-93-generic
    X Server Vendor:  The X.Org Foundation
    X Server Release:  11103000
    X Window Manager:  Metacity (Marco)
    Steam Runtime Version:  steam-runtime-release_2015-06-12

Video Card:
    Driver:  NVIDIA Corporation GeForce GTX 960/PCIe/SSE2

    Driver Version:  4.5.0 NVIDIA 352.55
    OpenGL Version: 4.5
    Desktop Color Depth: 24 bits per pixel
    Monitor Refresh Rate: 60 Hz
    VendorID:  0x10de
    DeviceID:  0x1401
    Number of Monitors:  1
    Number of Logical Video Cards:  1
    Primary Display Resolution:  1280 x 1024
    Desktop Resolution: 1280 x 1024
    Primary Display Size: 13.31" x 10.63"  (17.01" diag)
                                            33.8cm x 27.0cm  (43.2cm diag)
    Primary Bus: PCI Express 16x
    Primary VRAM: 4096 MB
    Supported MSAA Modes:  2x 4x 8x 16x 

Sound card:
    Audio device: Realtek ALC892

Memory:
    RAM:  3953 Mb

Miscellaneous:
    UI Language:  English
    LANG:  en_US.UTF-8
    Microphone:  Not set
    Total Hard Disk Space Available:  929320 Mb
    Largest Free Hard Disk Block:  13752 Mb

Installed software:

Recent Failure Reports:
    Fri Nov  6 22:01:21 2015 GMT: file ''/tmp/dumps/assert_20151106225941_2.dmp'', upload yes: ''Discarded=1''