I recently moved to iOS 5 / i/Cloud, and I too have had some problems. I certainly lost certain of my applications(including this one) but have been able to re-install them.
However what I am concerned about is:
A) as I now have all my music and all my photos on everything (laptop, iPad and iPhone) , I want to delete some music and some photos from my iPad and my iPhone. However, should I do that, will they also be deleted from my laptop?
B) with the music, certain of the albums are now missing the first, or the first few, tracks. I have found these, but separate, under the title of Track/Piste 1,2,3 etc. How can I put these back into their albums in proper sequence?
C) Word documents that are prior to .docx refuse to open. Some I can open with TextEdit, but the format and illustrations are lost; others I can't open at all. With archival material, this is very frustrating.
Any help/ advice/solution would be gratefully received .