I am currently using the emergeVWM applet in a one row, 4 column configuration. When using the top most desktop temporary artifacts are drawn on the applet when windows are created, minimized, or maximized. The artifacts are usually drawn on the applet in the spaces that represent the second or third desktop. The artifacts are cleared before the correct rectangle is drawn on the applet. This behavior also occurrs when using 4 rows with 2 columns and 3 columns. In the default 2x2 format, the behavior is not seen.
Vista x86, eD v22.214.171.1242