Description of problem:
Easytag doesn't touch the file when changing the tag, so the date is not changed (last modified).
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Easytag should touch the file when changing a tag.
This is a feature, which can be disabled.
Go to "Settings" -> "Preferences" -> "File Settings" tab -> "Preserve modification time of the file", which is enabled by default.
Ah, it's not a bug, it's a feature! ;o)