Dota 2 chat field text always appears distorted like this for me. It has since I first downloaded the game 3 to 4 weeks ago. I haven't seen it look otherwise. I'm playing just on Linux, by the way.

(I always play fullscreen, and haven't tried minimizing or anything.)

System Information:

Processor Information:
Vendor: AuthenticAMD
CPU Family: 0x10
CPU Model: 0x5
CPU Stepping: 0x3
CPU Type: 0x0
Speed: 3100 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 12.04.3 LTS (32 bit)
Kernel Name: Linux
Kernel Version: 3.5.0-39-generic
X Server Vendor: The X.Org Foundation
X Server Release: 11300000
X Window Manager: Compiz
Steam Runtime Version: steam-runtime-release-i386_2013-08-26

Video Card:
Driver: NVIDIA Corporation GeForce GT 240/PCIe/SSE2/3DNOW!

Driver Version:  3.3.0 NVIDIA 319.32
OpenGL Version: 3.3
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 60 Hz
VendorID:  0x10de
DeviceID:  0xca3
Number of Monitors:  1
Number of Logical Video Cards:  1
Primary Display Resolution:  1920 x 1080
Desktop Resolution: 1920 x 1080
Primary Display Size: 23.62" x 13.39"  (27.13" diag)
                                        60.0cm x 34.0cm  (68.9cm diag)
Primary Bus: PCI Express 16x
Primary VRAM: 1024 MB
Supported MSAA Modes:  2x 4x 8x 16x 

Sound card:
Audio device: VIA VT1708S

Memory:
RAM: 8090 Mb

Miscellaneous:
UI Language: English
LANG: en_CA.UTF-8
Microphone: Not set
Total Hard Disk Space Available: 461644 Mb
Largest Free Hard Disk Block: 305832 Mb

Installed software:

Recent Failure Reports:
Fri Aug 30 08:19:21 2013 GMT: file ''/tmp/dumps/assert_20130830031812_22.dmp'', upload no: ''Couldn't connect to server''

Confirming. It always looks like this for me. I always play in windowed mode.

Processor Information:
    Vendor:  GenuineIntel
    CPU Family:  0x6
    CPU Model:  0x3a
    CPU Stepping:  0x9
    CPU Type:  0x0
    Speed:  3201 Mhz
    4 logical processors
    4 physical processors
    HyperThreading:  Unsupported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Unsupported
    SSE41:  Supported
    SSE42:  Supported

Network Information:
    Network Speed:  

Operating System Version:
    Ubuntu 12.10 (64 bit)
    Kernel Name:  Linux
    Kernel Version:  3.5.0-39-generic
    X Server Vendor:  The X.Org Foundation
    X Server Release:  11300000
    X Window Manager:  Xfwm4
    Steam Runtime Version:  steam-runtime-release-i386_2013-08-26

Video Card:
    Driver:  NVIDIA Corporation GeForce GTX 460/PCIe/SSE2

    Driver Version:  4.2.0 NVIDIA 304.88
    OpenGL Version: 4.2
    Desktop Color Depth: 24 bits per pixel
    Monitor Refresh Rate: 60 Hz
    VendorID:  0x10de
    DeviceID:  0xe22
    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: 1023 MB
    Supported MSAA Modes:  2x 4x 8x 16x 

Sound card:
    Audio device: Realtek ID 892

Memory:
    RAM:  7953 Mb

Miscellaneous:
    UI Language:  English
    LANG:  de_DE.UTF-8
    Microphone:  Not set
    Total Hard Disk Space Available:  29525 Mb
    Largest Free Hard Disk Block:  12530 Mb

Installed software:

Recent Failure Reports:

@amorphine what OS are you on? If you're on linux, this is a duplicate of https://github.com/ValveSoftware/Dota-2/issues/20.

Sorry for taking time to get around to this, it’s a duplicate of the bug @Tele42 linked.