Being a very active TC/CE user, I found some issues:
On WM2003 the infrared doesn't work. After IAS_QUERY is shown in the status line, I get en error message "Error in function".
Also, the context menu on both WM2003 and WM5 is empty when I tap+hold on an empty area (usually, it contained at least "receive here by infrared".
- when I drag a file to the buttonbar that gets its icon from a system DLL (like text/office files that are assigned to standard office apps) there is no visible icon in the button bar. This is most likely due to the fact that those DLLs aren't readable by apps. Might it be possible to load the respective system icon like it is done in the normal file list?
Tree View:
- the right-key expands a folder only when it was previously expanded and collapsed egain.
- optical glitch: the tree has different distances to the four window borders
Properties dialogue:
- there is a graphical glitch: a small, 3px long vertical line below the label that shows the size of a file (I use 8pt system font, maybe it isn't visible with standard 9pt)
Some enhancement suggestions:
- configurable date format in the file lists
- function to calculate the used space of all subdirs of . (like Shift+Alt+Enter in Desktop-TC, I think)
Some more conceptual things:
- good you made it more compatible to WM5 by including OK and Cancel of dialogues into the menubar.
- this could be enhanced by using flat tabs and/or removing the WS_EX_CLIENTEDGE style from the tree view, which wastes valueable space anyway
- why is there a checkmark in the menu item for the virtual window modes? Also, this could be implemented as a sumbenu which holds the three alternatives, with the currently selected view mode marked by a bullet/checkmark. This would also remove the need for another dialogue.
Well, that's all for the moment

Ah I just noticed: very good that the font size settings now also work properly with 8pt fonts.