I just installed all the expansions and SPs on a new Windows 7 computer, patching each game after installing it.  When I run the game (from the Mansion & Garden Stuff exe, since it's the most recent), it doesn't recognize BV, FT, and AL.  I get the following messages:
"You have uninstalled The Sims 2 Bon Voyage.  If you continue, all Sims will return from vacation and be refunded for any purchased vacation homes."
"You have uninstalled The Sims 2 FreeTime.  If you continue, hobby secret lots will be removed."
"You have uninstalled The Sims 2 Apartment Life.  If you continue, all apartment lots will be converted to residential lots and all apartment residents will be moved to the family bin."
The "expansion info" buttons in the top right of the neighborhood screen are greyed out for those three EPs.  Some clothes/hair/items/etc from these expansions show up in CAS and Build/Buy mode, and some are listed but appear invisible.  Belladonna Cove appears in the neighborhood select screen, but crashes the game if I try to play it. 
The Bon Voyage, FreeTime, and Apartment Life folders are intact in Program Files, are listed in Add/Remove Programs, and have entries under "EA GAMES" in the registry.
The registry key "EPsInstalled" under "EA GAMES/The Sims 2/" says "Sims2EP1.exe,Sims2EP2.exe,Sims2EP3.exe,Sims2EP4.exe,Sims2EP5.exe,Sims2EP6.exe,Sims2EP7.exe,Sims2EP8.exe,Sims2EP9.exe", which seems to be in order.
I tried uninstalling/reinstalling BV, FT, AL, and M&G and had the same result.  Is there anything I can do besides uninstalling everything and reinstalling again?

This has been happening to me too, except instead of after tours, it happens whenever I click on the pay phone at a community lot. 

I had a romance sim on vacation in Three Lakes who rolled a want to woohoo in a tent, so I had her do it with a random tourist.  That was her first woohoo with that tourist, and it was supposedly public.  Though it fulfilled the want, it didn't generate any memories, and they didn't get the little floating woohoo hearts over their heads.  I tried a hammock, and that gave her a generic "Did WooHoo" memory and the floating hearts, but no public woohoo memory.  Does anyone know what could be causing this?  As far as I know, I have no non-awesome or non-BV-compatible hacks.

I have some downloaded clothing where I really like the texture, but there's a custom mesh that I don't like that makes my sims look unnaturally skinny.  Is there any way to make them not use the custom mesh and just look normal?

I had that problem, but I re-installed SimPE and that fixed it.

This is really cool!  There's some icons in there that don't look familiar at all to me.  One interesting file I found is called uieffects-headlines-conversationbirdbee010_lifo_1024x64.png .  It has some gender symbols and a picture of a baby.  conversationbirdbee, huh?

Thanks, Venusy!  That worked fine.   Now I don't have to listen to the OFB music.  Hopefully the music for the next expansion is better...

Edit: Just for fun, I tried replacing the music with a completely different song that I have that isn't even from the Sims, and that worked too.  I wonder if it's possible to do that for the neighborhood music, too...

I just got OFB, but I don't really like the music it plays on the loading screen when you first boot up the game.  I liked the NL music better.  Is there any way to make it so that it plays the NL loading music instead of the OFB music?

Can you have a baby taken away by the social worker, then have another non-Ethiopian family adopt it and raise it until it's a child, then have the social worker come again and have the original family adopt it back?