AAC (.m4a) file can play in Quicktime player... but not in iTunes!

I have QuickTime player v7.6.9. I also have iTunes 10.2.1.1
I have an AAC-encoded file which can play perfectly in the QuickTime player. It shows the song has a duration of 3:46.
I tried to add this to my iTunes library. It shows up with a duration of 789:57:13 and iTunes refuses to play it... just moves on to the next song on the list.
What's this all about?

Well, I'm not sure how this file was encoded originally, but luckily I had "faad" (Freeware Advanced Audio Decoder) installed on a nearby Ubuntu Linux machine.
I copied the AAC/.m4a file to the Ubuntu machine.
In a terminal, switched to the directory where the AAC file was and typed "faad yourmusic_filename.m4a" which created a .WAV file.
I copied the .WAV file to the Windows machine running iTunes.
Had iTunes add the .WAV file to the library.
Selected the .WAV file in the library and did "Advanced -> Create AAC Version".
Now I also have an AAC version of the song in the library that will play in both iTunes and QuickTime.
Say, wouldn't it be nice if iTunes would actually FIX the file on its own in the first place... or at least be a little more receptive to any AAC file you can throw at it like its QuickTime brother?

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AAC (.m4a) file can play in Quicktime player... but not in iTunes!

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