There’s nothing worse than an application sitting in the notification area of your system panel and sticking out like a sore thumb on the cohesive hand of your desktop.
Or something more poetic.
Below sit five such apps and some Lucid-loving replacement icons.
Installation instructions can be found at the respective links but, as a rule of thumb (what is it with the hand metaphors today?), most require running Nautilus as root (ALT+F2 > gksu nautilus /usr/share/icons) then navigating to the respective icon folder, replacing the offending pixels and restarting the application in question.
JDownloader Icon by aleixosk
Parcellite by ~Ramzea
Last.FM by ~half-left
GMoteServer by ~AndroMan28
Tucan (twitter app) by javierpsilocybin