Incorrect image size fits usb estimation

[Dražen Lučanin]

I have two images in my Downloads/ folder that are automatically recognised by the usb-creator:

 - Raspbian - 2 GB
 - ElementaryOS - 600 MB

I want to copy ElementaryOS to my 1 GB thumbdrive. Raspbian is selected first by default and it doesn't fit the thumbdrive. When I select the ElementaryOS, however, it is also marked as not fitting the drive and doesn't let me create the disk (the button is greyed out). I hacked this by deleting the Raspbian image and restarting the program - it worked then.

Expected behaviour - selecting another image that fits the drive should allow the startup disk creation - without any program restarts or manual image deletion.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: usb-creator-gtk 0.2.47
ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
Uname: Linux 3.8.0-26-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: amd64
Date: Wed Aug 21 11:16:48 2013
InstallationDate: Installed on 2013-01-20 (212 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
SourcePackage: usb-creator
UpgradeStatus: Upgraded to raring on 2013-05-05 (107 days ago)