Lags & Invisible, Frozen & Stuck Sims --> Post here if you have the issue.

Basic System info:
Desktop, AMD Athlon II X4 635 processor, 4096 MB RAM, ATI Radeon HD 5700 Series graphics card, Windows 7 Home Premium 64-bit

I have World Adventures, Ambitions and Late Night, all fully patched. I only have a little CC from the EA Store, no mods or third-party content.

I experience Sims freezing, lagging, resetting/teleporting, and some other issues listed in the LN bug list compiled by crinrict. Unfortunately I don't have anything useful to add. Thank you to everyone trying to make sense of this mess.