Q:

How do I make older images in my /sdcard/DCIM folder show up in Gallery?

I've tried a few builds of Android Jelly Bean coming from Android Ice Cream Sandwich, and one common thing that happens is that Gallery will only show pictures taken after the ROM installation. The images themselves are still in the /sdcard/DCIM folder, but they are just not showing up in Gallery.
My phone is a Verizon Samsung Galaxy Nexus.

A:

This behaviour is not uncommon, sadly.
I use SDrescan to fix it usually.
Here are some other questions targeting the same underlying problem:
The music player keeps displaying deleted songs. How do I remove them or refresh the library?
Picture Gallery Slow & Won't Refresh on HTC G2 w Android 2.3 Gingerbread

