Install apps on iPod touch?

[LolXD]

I think you have to update the i pod touch to iOS 4.3 version. On the terms and policies things they have said you can update all the decimal ones like 4.1 to 4.2 but you cant go from 4.5 to 5.0 if you get what i mean. This means you should be able to update your i pod. Also, this is just a guess, did you check if your apps needed updating. They might have not worked because they needed updating. But for Instagram I think you need to update your i pod touch. Hope this helped. And sorry i this didn't make any sense.