System Information
64bit Linux Mint 16, kernel version 3.11.0
GeForce GTX 650 Ti, driver version 419.32

Blender Version
Broken: 2.69.0

Short description of error
When importing a Collada file, any materials that do not specify specular shading will have their specular set to the default. This appears to be incorrect, as a material should only have specular if it is specified. Because of this, collada files exported from blender that have no specular will have the default specular when re-imported. I have no idea if this behavior violates the collada standards, though I am assuming that it does violate the standard as it seems illogical.

Exact steps for others to reproduce the error

1. Create a new object and create a new material for it
2. Set the Specular Intensity to 0
3. Export the scene to a Collada file.
4. CTRL-N to start a new file.
5. Import the Collada file you just exported
6. The Specular Intensity will again be at 0.5