I found a bug that you probably couldn't test for. When the game starts and zoom was last set to 3x, the menu initially appears in the corner of the window and it sometimes fails to load levels. This is not an issue for 2x zoom.
I had a similar problem with 2x zoom. I had to reorganize the zooming handlers to add the remembered zoom and hide-desktop features. Surprisingly, the remembered zoom level was the most problematic. When starting in 3x zoom it skips the 2x zoom stage which wasn't possible before, hence I'm not surprised. I never figured out why starting with mixed zoom levels breaks the level selection menu, but that problem disappears when it zooms correctly.
Finally, I've found the inclusion of room co-ordinates when testing levels really helpful. What do you think about also including them when playing levels normally when cheat mode is enabled? It would save me time when beta testing levels for others.
That's a good idea. Beta testing and bug reporting are better done with coordinates. It would be better if you didn't have to sift through a level in the editor to find them. I wouldn't want to put it in cheat mode because you'd have to know the cheat code to use the feature. I don't want to let players access test mode either because they could find secrets by revealing the collision mask. ... I'll think of something.
Edit: Here's KS+ 0.9.8! It hopefully fixes the 3x zoom issue without breaking anything else. (I don't have a monitor large enough to test 3x zoom. :/ ) I'm not sure what was wrong with it, but I've reworked and simplified the sections of the program that deal with zooming, fullscreen, initializing, and test mode. Incidentally I fixed a bug with exiting fullscreen mode when opening the installation menu that I added in the last version. Oops!
You can toggle the screen coordinates with the F12 key in normal an test modes.
*gives star to Sergio for bug report* Edit: Found a bug while playing "Cosmic Meltdown". Having multiple objects 6:9 and turning off the hologram near one, causes them all to shoot. Seems to work correctly if you approach without the hologram. Will fix it, but until then, if you're playing "Cosmic Meltdown" with KS+ you'll have to switch to original KS for the last section.
Edit: Level Editor Plus is updated to include support for the new Attachment and Tint features, 0.9.3. It also has a check box to make OCOs harmless. I discovered a bug with the Attachments. They couldn't be turned off! I'm not sure how that one got by me. Anyway, KS+ 0.9.8b is available with a fix for that. Get them both at egomassive.com/ks. The 6:9 bug I mentioned earlier hasn't been fixed yet.