More often then I would care to see, my rather large VB project behaves in a most annoying manner.
1.I use a picturebox as a container for user controls (to achieve similar to wizard or guide effect). Occassionally if I compile but don't save first, the picture box disapears, but the child user controls remain.
2.Sometimes usercontrols become Picturebox (particularly after VB crashes (which it does a lot))
3.Occassionally, OCX controls get references as if they are dlls (or for the OCA file) including standard Microsoft Controls.