I know that this was a symptom when the controls overlap with another control, but I'm sure that I don't have any overlapping controls on the page in the screen shot here. This page has only two controls on it and was created with code like this:
Can anyone help me figure out why these controls are disappearing?nsDialogs::Create 1018
Pop $0
${NSD_CreateLabel} 0u 0u 100% 11u "The following messages show failed components or indicate actions are required."
Pop $0
${NSD_CreateListBox} 0u 20u 100% 67% ""
Pop $ErrorsPage.hLBox
... # code to fill the list box
# Display the page.
nsDialogs::Show
Thanks