Hi Brian,

Seriously large pears for such a little tree!

Like most things in 3D, there is always a little bit of finesse and seldom is a perfect solution attainable for something complex like this. But there usually is a best or pretty good solution! ;)  

I can't provide a bullet-proof fix-all for you but heres the things involved that I play with:

You might try increasing the accuracy of the placement to Best. Also, the tree itself is an elaborate algorithm and not actual geometry. The placement function of the Surface Replicator is math magic too. So, there probably is a margin of error that will be more evident on certain tree set ups than others as fixed geometry is expected to orient to bounding boxes and Render-time geometry.

Increasing tree fidelity, adjusting propagation and other little items can help. Slightly repositioning the hot point of the fruit can help. Also allowing the fruit to rotate randomly on the Z axis can provide better fits. Scaling the fruit differently helps significantly. 

It's all therapy man....  :D