I get this error
a lot and it's always with MP3's bought from....wait for it... Amazon.
I teach guitar and for each student i use a seperate Sonar project with Amplitube 3 and any material (audio files) that we're working on. I often purchase MP3's from Amazon of any songs my students want to learn. Lately (and I'm not outright saying since X1 but it's possible) I get the 'Out Of Memory' error when trying to import MP3s from Amazon. Strangely, not on all though, but on the majority.
Recent MP3s from Amazon that produce this error for me (off the top of my head)
Pyro - Kings Of Leon
Radioactive - Kings of Leon
Rolling In The Deep - Adele
Love Me Like You - Magic Numbers
Forever Lost - Magic Numbers
Mosely Shoals Deluxe (the whole double album) - Ocean Colour Scene
Who Knew - Pink
Paint it Black - Vennessa Carlton
I currently get around it by simply using Windows Media Player alongside Sonar. I will definetley get around to trying some of the fixes mentioned here.
Thanks
Dean