http://bugs.winehq.org/show_bug.cgi?id=20593
Summary: When turning by holding down the mouse button, you can only turn 180 dregrees Product: Wine Version: 1.1.32 Platform: PC OS/Version: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: winex11.drv AssignedTo: wine-bugs@winehq.org ReportedBy: eqisow@gmail.com
I'm not sure what component this would be, or what causes it, but when playing Vanguard: Saga of Heroes and turning by holding the mouse button and moving the mouse left/right, you can only turn ~180 degrees, at which point it just stops. You can, however, move back the other way. The total available movement is just limited to 180 degrees w/o lifting off the mouse button.
Vanguard uses the Unreal3 engine, so the issue may be present in UT3 and other games as well.