IPhoto being very CPU intensive

Hi, at the moment, when iPhoto (7.1.3) is open it seems to be working the CPU extremely hard as if it is processing something but I am not using it.
I am running an iMac G5 with 2GB ram under OS 10.5.3 with current updates installed.
I have recently "reverted to original" all my portrait oriented shots to ensure the full size version is available to me when I wish to do some editing, can it be processing the converted files in the background somehow?
It's really bugging me as the fan is running flat out to keep the cpu cool, and thats not cool
I have 6500 or so photos taking up 35GB of memory.
Cheers in advance.

Most cameras I've used are able to turn off the auto-rotate feature. You just have to find the correct menu. I upload to a folder on the desktop first and rotate the files losslessly before importing.
When you launch iPhoto which mode are you in? If it's Photos do you have Event Titles selected to be displayed? If so do you have all the Events open? Having all the thumbnails displayed when opening will definitely cause slowness and intensive CPU usage.
TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto (iPhoto.Library for iPhoto 5 and earlier) database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.
I've created an Automator workflow application (requires Tiger or later), iPhoto dB File Backup, that will copy the selected Library6.iPhoto file from your iPhoto Library folder to the Pictures folder, replacing any previous version of it. It's compatible with iPhoto 6 and 7 libraries and Tiger and Leopard. iPhoto does not have to be closed to run the application, just idle. You can download it at Toad's Cellar. Be sure to read the Read Me pdf file.≤br>
Note: There now an Automator backup application for iPhoto 5 that will work with Tiger or Leopard.

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IPhoto being very CPU intensive

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