I just installed 1.4.4. today and am now no longer able to save files in an AAC or Mp4 format. I get an error message saying the correct codec may not be installed. When I save the file as an AIFF I am no longer able to convert that to AAC format in iTunes itself, as it says the bitrate settings don't match.
Hopefully Martin can get these issues squared away.
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Suzuki SX4 specifications
Saving Mp4 files in 1.4.4
Moderator: Martin Hairer