Warning: this was not reproduced on 2018.1.0a1, but I wanted to let the development team know about it in case it's something important

Steps to reproduce:
1. Open any Unity project
2. Import both of the attached PSD files

Actual result: The area of Error.psd that has the same transparency as the black and white areas of Working.psd looks different (with or without Alpha Is Transparency enabled), see atttached image sample.png
Expected result: no difference between the files

Note: the Working.psd file has one difference - it contains a vertical band of fully transparent pixels near the middle. Making some pixels fully transparent in the Error.psd makes it import correctly (see transparencyexample.png).
Note 2: comparing the results in Unity and Photoshop it's more likely that the Error.psd is imported as a more accurate representation in regards to the actual alpha channel within the file, however, the behavior is still inconsistent.

Reproducible with: 5.6.0f3, 5.6.2f1, 2017.1.0f3, 2017.2.0b11
Not reproducible with: 2018.1.0a1