during install with xubuntu 14.10 daily build downloaded yesterday ( 20140614 ), the 4th slide become much bigger than the first three slides, on the following slides ( I don't remember really, maybe the 5th ) some buttons located on the lower right corner are not entirely visible on 10.2 inches ( netbook ) screen then you have to "guess" what's on those buttons.
If back button is pressed the slides 3,2 and 1 appear now in a bigger window too
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 3.15.0-6.11-generic 3.15.0
Uname: Linux 3.15.0-6-generic i686
ApportVersion: 2.14.3-0ubuntu1
Architecture: i386
CurrentDesktop: XFCE
Date: Sun Jun 15 12:36:26 2014
InstallationDate: Installed on 2014-06-14 (0 days ago)
InstallationMedia: Xubuntu 14.10 "Utopic Unicorn" - Alpha i386 (20140614)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)
What's your screen resolution? Can you take screenshots of the installer before and after the issue?