Played dota2 from windows with big picture on, reboot to linux, big picture on, launch dota2 and constantly got the couldn't sync files error. Each time I closed the error dialog, another one instantly spawned. The game ran just fine but the errors kept appearing.

Processor Information:
    Vendor:  GenuineIntel
    CPU Family:  0x6
    CPU Model:  0x17
    CPU Stepping:  0xa
    CPU Type:  0x0
    Speed:  2100 Mhz
    2 logical processors
    2 physical processors
    HyperThreading:  Unsupported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Unsupported
    SSE41:  Supported
    SSE42:  Unsupported

Network Information:
    Network Speed:  

Operating System Version:
    "openSUSE 12.3 (x86_64)" (64 bit)
    Kernel Name:  Linux
    Kernel Version:  3.7.10-1.16-desktop
    X Server Vendor:  The X.Org Foundation
    X Server Release:  11302000
    X Window Manager:  KWin
    Steam Runtime Version:  steam-runtime-release_2013-09-05

Video Card:
    Driver:  NVIDIA Corporation GeForce GT 320M/PCIe/SSE2

    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:  0xa2d
    Number of Monitors:  1
    Number of Video Cards Not Detected
    Primary Display Resolution:  1366 x 768
    Desktop Resolution: 1366 x 768
    Primary Display Size: 13.54" x 7.60"  (15.51" diag)
                                            34.4cm x 19.3cm  (39.4cm diag)
    Primary Bus: PCI Express 16x
    Primary VRAM: 1024 MB
    Supported MSAA Modes:  2x 4x 8x 16x 

Sound card:
    Audio device: Realtek ALC269

Memory:
    RAM:  3959 Mb

Miscellaneous:
    UI Language:  English
    LANG:  en_US.UTF-8
    Microphone:  Not set
    Total Hard Disk Space Available:  210656 Mb
    Largest Free Hard Disk Block:  87570 Mb