https://bugs.winehq.org/show_bug.cgi?id=32279
--- Comment #4 from Mark K markk@clara.co.uk --- Testing with Wine 1.7.44 and IsoBuster 3.6 now.
The bug is still present, but different to before. At least, the treeview behaves differently to native Windows (7).
Run IsoBuster and open an ISO image which has many directories and subdirectories.
On native Windows: Single-click a top-level directory name in the treeview. (Click the directory name, not the [-]/[+] box to the left of the name.) That directory's files are shown in the right-hand pane, but the directory is not expanded in the treeview. You have to double-click a directory name to expand it.
Double-click a top-level directory to expand it, then double-click another top-level directory to expand that too. The first directory remains expanded in the treeview.
On Wine (with built-in comctl32, I didn't try native): *Single*-clicking a top-level directory name expands it. And if you single-click a second top-level directory name, the first directory is collapsed.