Because of problems with the export function of Confluence reported in other posts but not yet being fixed, we are having to work with Confluence in an unusual fashion. We take a block of folders in our primary space, move them to an otherwise empty space, export them as an HTML file, then move the folders back to the primary space. However, after about 40 of these operations, Confluence is becoming erratic. At one point it threw and error and said we should contact support (a refresh cleared the problem) and going to the home screen for the space being used for the transfer no longer shows the folder tree in the left column, just recently touched pages in the main part of the screen.