Confused... why are my exports smaller than my versions???

I am having a heck of a time figuring this out. My file size (I've not done a thing to the photo since importing it) is 4.29MB. When I export the photo as a version it's 1.81MB. What's going on here?

Ezra,
I think you may need to step back and get some of the basics of Aperture. I'd suggest starting with this part of the manual:
http://documentation.apple.com/en/aperture/usermanual/index.html#chapter=3%26sec tion=1%26tasks=true
So with iPhoto I was able to export the exact same sized photo that was in iPhoto.
iPhoto is different from Aperture in many ways. iPhoto keeps your master, untouched (obviously at full size), and when it applies each adjustment, it derives another full-size photo which is also stored in the library. Thus, in your iPhoto library, there are 2 full sized pictures.
Aperture, however, keeps a version. The version is a recipe: applying certain instructions to the master to derive the image you want. The versions are virtual. Yes, there are thumbnails and potentially previews, but these are low-res cousins of your master, with adjustments applied. No where in the Aperture library is there a full-sized photo corresponding to your version. I.e., there is no analog to "exact same sized photo that was in iPhoto" when discussing Aperture.
If you were to export my originals with the adjustments I've made, for the sake of back-up, what's the best way to go? TIFF?
(Sorry if I'm beating a dead horse, but I'm trying to address your questions, and they all lead back to the same place...)
There is no such thing as "originals with the adjustments". Those are versions. For the sake of backup, I would use a vault.
If you wish to torture yourself for a couple minutes, you can read about the very topic you asked about, posted two days ago: Shouldn't I regularly Export versions (thorough backup).
In direct answer to your question, I have a few. The first is: since Aperture keeps your masters (if you have chosen to import into the Aperture library) and the instructions to get to any version, backing up your Aperture library is the best way to ensure your versions remain intact. To go along with that, is to back up your masters as you import them (You can review that in the Import dialog). However, and I think this is what you were asking, if you want to "bake in" adjustments, I would use TIFF. That's just my opinion. Should you choose the above torture, you will also find some other opinions. Of course, if you choose to "bake in" the adjustments, you have degraded your photo. Any further adjustments you do in the future will not produce as high-quality as if you had your master accompanied with the recipe (version).
Hope this is at least a bit enlightening!
nathan

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Note: Disclaimer: This posting is provided & with no warranties or guarantees and confers no rights..

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I have been on a support chat with Adobe for 2 hours now and they can't figure this out but hopefully one of you can!
I exported my files as a LightRoom Catalog
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Editor exported the files as a Lightroom Catalog and zipped them
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     Embed Original Raw File (check on)
I checked the Pixel dimensions on my exported photos and they are smaller
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4912x7360 and the new size (after exporting) is: 1709x2560
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Hi All ~ Thanks in advance for your help!
I have been on a support chat with Adobe for 2 hours now and they can't figure this out but hopefully one of you can!
I exported my files as a LightRoom Catalog
I zipped the catalog and the smart previews together
I sent the zipped folder via Dropbox to a photo editor
Editor edited the photos
Editor exported the files as a Lightroom Catalog and zipped them
Editor sent the LR Catalog back to me via Dropbox
I opened the Lightroom Catalog in LR (the pixel dimensions are the same as the originals)
I exported the photos as DNG's (which does not allow for any file size changes - I also tried JPGs and the same thing happened)
     Camera Raw 7.1 and later (I tried them all just to see - and they all rendered the same result)
     Embed Fast Load Data (checked on)
     Embed Original Raw File (check on)
I checked the Pixel dimensions on my exported photos and they are smaller
The original pixel dimensions are:
4912x7360 and the new size (after exporting) is: 1709x2560
But here's the real kicker! WHEN I UPLOAD A PHOTO TO LIGHTROOM FROM MY COMPUTER DIRECTLY (not from a LR catalog), AND EXPORT THAT FILE, IT EXPORTS AT FULL SIZE with no change in the pixels dimensions!

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