There were so many solid entries for this feature, it was hard to narrow down the selection to only 10. Here's a list of honorable mentions: which are your favorite?
Reduced the urge for neat Sims to put away fire pits.
"Become Enemies with Child" wish no longer appears.
Prevented a case where toddlers were allowed to escape a lot and wander freely.
Sims will no longer get a wish to ask their husband to be their boyfriend
Parents will no longer wish to "See Sim Get Married" for their already married children.
Toddler's body no longer deforms when "Watching TV" after "Learning to Talk."
A faint line is no longer visible on the heads of babies.
Sims who run into obstacles placed directly in front of them, no longer get stuck.
Non-Kleptomaniac Sims will not take and put away portable fire pits that belong to community lots.
Only one Grim Reaper will appear on a lot where more than one death has occurred.
Sims can no longer perform mean socials to children.
Child and Teen Sims will not autonomously sit down in the street to do homework.
Swimming Sims no longer walk on water after The Sims™ 3 is updated.
Fixed a bug that could cause mummies cured of their mummy status to retain the mummy walk style.
Sims can no longer travel with Sims who are in jail.
Tourist NPCs can now be impregnated.
Mummies can no longer learn songs. Their vocal chords have deteriorated leaving them mute.
A change was made so that desks do not burn anymore.
Dead relatives will no longer appear alive in your Sims’ family trees while traveling to Egypt, China, or France
Sims will no longer walk on water to view paintings placed on swimming pool walls
Kleptomaniac Sims are no longer able to steal the holes created by the Miner invention
The wish to “Skinny Dip with Simbot” will no longer occur.
Sims will no longer receive a wish to “Skinny Dip” with Mummies.
Baby Sims will no longer become stuck on a Sim’s hand while driving a car.
Baby Sims will no longer answer a call from the Callbox and invite Sims in.
Sims can no longer hang out with Celebrity Sims on swing sets before properly impressing them.
Stylists will no longer receive job requests from pets
Kleptomaniac Sims can no longer steal Subway stations from lots.
Top image from Fuck Yeah Sims Glitches, the rest from official Sims screenshots or the Sims Wiki. Special thanks to FlatLuigi.