I think the issue about "Removing whitespace" keeps coming up because the is some misunderstanding about how it works. It removes as much whitespace in between html tags that it can but not every single bit of whitespace. It won't remove it all because sometimes when you have unordered lists or a link after another link, you don't want whitespace removed.
To see what it is removing, you can perform the following:
1. Enable the parameter on the plugin settings,
2. Load a page and save the source of the output.
3. Disable the parameter and/or plugin.
4. Load a page and save the source of the output.
5. Use a file comparison tool to compare the output of the two pages. Most programming text editors have a utility that can perform this.
If it isn't removing anything at all, let me know.
Kindest regards,