Does AppleTV2 limit the number of photos it will display when streaming from Aperture when streaming to the TV?

Question

I am new to AppleTV. I bought it and an iPad2 at about the same time. I've been an Aperture user for years but not so much lately. I am having fits with Aperture crashing as soon as I open it. I mean on the first click or before. I simply can't get into Aperture at all during the last 20 tries or so. I'm really rather freaked out about it. I have a wedding to upload and a few other recent events totally thousands of photos that I can't get off the SD cards. Thankfully I'm not a professional but my niece is anxious to see her photos nonetheless.
I don't know if the galleries in MobileMe even exist anymore but that was my idea as an alternative place to try to access photos from my computer to see them on AppleTV. It might have been my high level of frustration and despair but I could not find a way to move the photos to MobileMe from Aperture (on the day I could get into Aperture). Export does not list MobileMe as an optional destination. It's been too long since I sent anything to MobileMe and I can't remember how I did it.
In the past and even today I've successfully accessed a few of my photos in Aperture through my AppleTV2. Thankfully, Aperture does not need to be open to see the photos. However, my problem is that when I stream through AppleTV I can only get to a miniscule fraction of my photos. I have a selection of projects that will appear on my TV but the vast majority of the projects list only ONE photo in the project when there are dozens, hundreds or thousands in the various projects.
I tried making some new projects and that partially worked. Some of the ones I just made still only show one photo but I made one with about a thousand scenic photos that sort of worked. I loaded it to play during a party today and about 500 were listed in the folder when I started the slideshow. I didn't count them as they played, of course, but it certainly seemed they replayed more than I wanted them too in spite of the five second time selection. I will move that to 10 seconds next time. What I really want to do is have access to large groups of different photos I have in Aperture. I want to pull in a mix of trip locations, wildlife, scenic shots, etc. It would be nice if Aperture picked up Smart Albums and not just projects.
I have multiple problems going on: computer freezes, cursor moves but won't click and keyboard becomes unresponsive, flashing artifacts and horizontal lines, CRASHES galore. Right now I'm feeling kind of panicked it's going to crash before I hit "post message". If you can offer any guidance in any of these areas, your help will be deeply appreciated.

Answer 1

John, thanks for pointing out that pathway to send files to MobileMe. I was looking under Export.
Yes, I know that some of my concerns may be better suited to other forums but all of my problems hinge around updating to Aperture 3 and Snow Leopard at the same time. Therefore I have no clue if it's one or the other or a toxic combination of both that has brought me such misery. My problems cross into several categories. I've prowled the forums (communities) for many months looking for advice.
If I can ever get back into Aperture I will surely try your "update previews" suggestion. I did the Repair Permissions and it just finished as I was typing here. It opened Aperture for a couple of seconds and crashed in the background. I got the same crash with the Repair Database. I'm now doing the third Option/Command option in Aperture of rebuilding the database. I don't know what to do if those repairs/rebuilds don't work.
I have the program on my number one hard drive with over 300 GB free space. My libraries are on my second 1 TB HD with 369 GB of free space. I've been accessing Aperture with nothing else running and that doesn't help. I have four 512 MB DDR2 FB-DIMM cards. I would love to have more RAM but that's all I've got right now. I also wonder if my Graphics Card is toast for the new OS and version of Aperture. I don't know enough about computers to figure this out and I'm hoping someone will have the solution I need.