Please concentrate your bug reports for v1.21 on this thread. If you may please elect to adapt the following report form below: Track & Layout Used: Car Used: Applicable Settings: Report: Steps to reproduce: Ex: Track & Layout Used: Montreal 88 Car Used: Formula V12 Applicable Settings: n/a Report: After losing front wing the car gets airborn above around 100mph. Steps to reproduce: Crash and lose front wing, drive fast For any difficulties related to installing, running or setting up the game which are not necessarily bugs in the software, please use the v1.21 release thread. Please allow time for us to test, verify and rectify the issues. We might not reply to you right away but rest assured if you posted here, we will have read it. Avoid repeating reports by trying some recommended solutions below to known problems: Measures to try regarding the various CTDs / crashdumps: 1-Run GSCSync again or install from the RAR update packages, make sure you have the lastest GSC.exe; 2- If you had mods installed, try deleting your Gamedata\Shared folder and running GSC Sync again to restore the v1.20 shaders (refer to the note regarding issues with 3rd party mods & tracks in the opening post GSCE V1.20 Released). Regarding stuttering: -Try deleting your USERDATA\LOG file, and creating a fresh player profile (PLR); Regarding shadow flickering issue: - Try creating a shortcut to GSC.exe and add -fullproc to the command line, performance will be worse but it might prevent the issue from happening.