Is there a way to tweak the amount of padding inside UI elements in Ubuntu, besides installing a different gtk theme?
This is how eclipse looks in Ubuntu (with the Radiance theme)
And this is how it looks on XP
What I would like to do is reduce the padding around the icons in the toolbar or the padding around text in tabs. Is there an app or some config file I could edit?
Try to see if this solution works for you.
http://blog.sarathonline.com/2008/10/solved-eclipse-looks-good-in-ubuntu-now.html
Its specific to Eclipse.
Personally, I am now used to Eclipse in Ubuntu now after an upgrade to 24" LCD and reduced font size :)
There is a somewhat outdated theming tutorial on the GNOME wiki that might be useful.
Gnome Colour Chooser appears to be able to alter padding on buttons etc. its available from the software centre.