Keynote file size limitation on iPad

My iPad had been updated to iOS4.2 and installed keynote 1.3. When I tried to copy a powerpoint presentation that was plenty of photos Keynote over using iDisk, I got the error message:This file is too largeThis file can not be viewed on your iPad because it is over 30MB.In fact, iDisk and Dropbox seems to be limited to 30MB. You can transfer keynote docs from a computer to your iPad using