I haven't had a problem with most downloads to the SD card sicne 2.1 ota but i have noticed that I can't save backgrounds anymore from the Backgrounds app to my sd card like I could on 1.5 It says something about making sure I have a sd card inserted and that it is mounted.

edit: in another thread I saw solution from MsJulie saying to reinstall the app. I did this and now not having the problem with saving to sd card. Maybe look into reinstalling any app you are having a prob saving to sd from.

 

Had the same problem the other day, Eris not recognizing the SD card inside. Restarting, battery pull, etc. did not help. What did was taking a friend's SD and putting it inside, which worked. After which, my original card was recognized again.

 

I had this problem, and doing exactly what Acyd said worked perfect. Although I found out this way by chance. Goodluck everyone if you have problems like this.