DTP has started behaving strangely recently. In 3-pane view I select a document from the list in the top-right pane and it displays in the pane below as expected. The third time I try doing this, however, nothing happens, i.e., the selected document is not displayed in the pane below, and I can no longer select any other document because DTP seems to be frozen (although not completely, since I can still access the menu bar). I quit and restart DTP, only to encounter the same problem, always on the third selection of a document in 3-pane view. (It doesn’t seem to happen in 2-pane view.) Verifying, optimizing, and rebuilding the database make no difference.
What could be causing this behaviour? (My database is quite small, only about 500 files and 150 MB.)