portrait orientation photos very slow to appear

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Have landscape and portrait orientated photos (EXIF)
2. Open a landscape photo, then switch to a portrait.
3.

What is the expected output? What do you see instead?
Transition is very slow. (30 seconds) After that switching back and forth is 
smooth but when switching to the next portrait orientated photo, it's again 
very slow.

What version of the product are you using? On what operating system?
1.40 beta 2 but 1.32 before. Same. Windows 7

If you are transcoding a media file, which engine are you using (mencoder, 
avisynth/mencoder, tsmuxer?)

If the media file is in error (or does not play flawlessly), what are the codec 
informations of this file (you can use following program: 
mediainfo.sourceforge.net) ?

Please provide any additional information below and PLEASE JOIN debug.log file 
!!

Original issue reported on code.google.com by peter.cs...@gmail.com on 29 Aug 2011 at 4:12

[GoogleCodeExporter]

Is there a solution meanwhile?

Original comment by Lutz.Gue...@googlemail.com on 27 Sep 2012 at 6:29