One of the ghosts was playing tricks with the blogroll in the sidebar earlier and listed a "Daisy Finnegan" under Gryffendor house. Luckily a friendly Gryff was visiting her housemate's blogs and noticed that the link actually went to the blog of Emma Kettleburn of Hufflepuff!
There is only one Daisy Finnigan, and she is a Ravenclaw. If you notice any more tricks by ghosts
or death eaters, send an owl to your prefect and we'll take care of them for you.