disappears

Well, I dont know if this only happens with me but when I activate the turbo mode and go to swoop the trail just disappears! I wonder if this is happening with you too...:p

HELP!!1!!231! what the title says, if i hold down my mouse wheel to pan the model just disapears and i only see the bounding box till i release it >_< i just need an answer then the topic can be closed, but atm, i cant work under these conditions :(

when i recentaly blocked a spirit bomb and while i was trying to push it back i was shot at with a blue attack which disappeared into the spirit bomb not evan an explosion just POOF!!!! gone