I use GNOME/Gentoo. I am unfamiliar with XFCE4, Fluxbox, Openbox, etc. I also cannot help with specific mods in some distros (e.g., Ubuntu), so if its not default to GNOME, please, don't expect any help from me specifically.
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Q). Why does my theme look all busted and screwy (yes, screwy is a perfectly legitimate technical term).
A). My themes are pixmap based. They don't work all that well with resizing and are suited to my system. This could be resolved if they were code-based, but hey, I am an artists not a coder. If you follow the font settings, you should be OK, but, if it still doesn't work for you, you are on your own. I release me themes "as-is" and if it works on my system (the theme wouldn't be released if it didn't), then I can't help you. I honestly do make an effort to fix anything that crops up, but sometimes its either a limitation of my skill, or the pixmap theme structure itself.
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Q). What font are you using? What DPI? What settings?
A). I am using bitsream-vera (gnome.org/fonts). I have it set to 75 DPI and at 10 pixels. These settings ensure that your themes will look exactly like mine. Use the Font Manager in GNOME to fine-tune your settings.
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Q). How do I remove the program icon on the Metacity window borders?
A). This setting is located directly in gconf. Fire up gconf-editor and go to: "/apps/metacity/general/button_layout". Next we need to change this line: "menu:minimize,maximize,close" and remove the "menu" entry. Leave the ":" as this makes the buttons stick to the right. If you remove it, the buttons will all move to the left.
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Q). Can I get that Nautilus background?
A). The Nautilus background is nothing really, but I will make it available in my scraps:
[link]
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Q). I want to download your Tango icon theme.
A). Not released yet. I do appreciate everyones enthusiasm, but it won't be public for a while. No amount of pleading, begging, or groveling will change that (please stop sending me emails asking to be solely sent the set for uhh, testing purposes). It's just not mature enough and there are licensing issues to work out still.
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Q). How do I change the icons in the notification area (programs such as GAIM and Banshee)?
A). Most of these icons don't load from the icon theme. They are internally built into the program or load from other (obscure) directories. The GAIM icon for example loads from /usr/share/pixmaps/gaim/icons. For these two reasons, they are extremely hard to theme. So the answer is not a simple one; you will have to hunt down where the icon might be, and sadly, most of the time the icons are built into the program. Without going through the source, there is no easy way to change them.
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Q). Help, when I try to install your themes, I get a error message saying, "The file format is invalid." What's going on?
A). This is because the files are either compressed using zip or rar. DeviantArt doesn't like tar.gz extensions. GNOME doesn't recognize these file formats. What you will need to do is unpack the file by hand for local users:
~/themes/ (for themes)
~/icons/ (for icons)
Alternatively, you can unpack them for system wide use:
/usr/share/themes
/usr/share/icons
NOTE: /usr/ might be different depending on your distribution and where it installs GNOME.