Don't ask me why sometimes textures seem misaligned in DLE-XP that aren't. I didn't write the rendering code - it's the code Bryan Aamot created for DMB2. In case you don't know: DLE-XP is built on Bryan's DMB2 code with his permission. That means, while the UI is new and there are a lot of features, the basic stuff is identical to DMB2.
You can (therefore) mirror cubes like in DMB2. There are three buttons in the toolbar controlling insert mode - "add normal", "add extended", "add mirrored" cubes:
![Image](http://www.brockart.de/descent/images/add-mirrored-cube.jpg)
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There is only one alignment command that explicitly only works on marked sides: "Reset marked sides". To align only certain sides, it should be sufficient to mark the affected sides and simply click on "align children".
This stuff definitely doesn't belong here though, but in the "DLE-XP bug report and suggestions" thread. Maybe a mod can move the last few posts there?
![Smile :)](./images/smilies/icon_smile.gif)