The tag cloud as well as the search has problems with compound words:
I have the tag "group" in my tag cloud an submit a new story with the tag "working group". Pligg creates a tag "working group" and displays the tag "group" bigger. A click on the tag "group" shows the stories with "group" and "working group" tags
Edit: I haven´t changed the separator, it´s still the colon (,)!




Linear Mode




