The file gpp.png is incorrectly named. If you are using the British Pound as your currency then the correct code is GBP. So if you add it to the ones that are already there, USD and EURO(which should be EUR and the image for that should be eur.png) then the £ sign does not appear until you rename it gbp.png.........not so much a bug but still bugged me enough to look for a solution.
Easy fix for you guys. You might wanna change it in the download page and maybe add a few more currencies while you're there.
For crying out loud, you say Boonex is proudly Australian. Then how about adding AUD to the list as well?
Peace...Profesize (Proudly Australian)
