Hi All
The Graph is OK and No, it's not too short...Clip is 1min 30 secs according to the time scale....

...so the fade-in is about 5 seconds so it should be visible. I note that it is a MOV file....Wonder if there is a connection here?
Bit Later.. Nope!
Checked a MOV file with VP 8.06 and a Transparency fade-in. Previews OK.
Exported as mp4......That faded in OK as well. Stumped as to why yours doesn't work.:wacko: Best to use the F box. Not absolutely sure what you mean by the "arc" of the fade-in as it should still be a linear effect.
Also tried multiple clips with fade-in on first MOV.....Still OK
I think the best way to to proceed would be to save your project usiing the File option Save Portable Project As. This results in a dated/numbered folder containing copies of all your project files plus a vpj file. If you upload that folder to dropbox or equivalent hosting site with a link to it on the forum. Someone will take a look and at least try it on the latest version of VP..
Nat