The first thing I noticed about Diana was my editor tabs look funny. When the editor pane is in focus, the active tab is colored grey. If the editor pane loses focus, then the active tab is colored a lighter shade than the non-active tabs.
This is with "Alloy IDEA Theme". I just tried a few of the other themes like "Alloy Default Theme" and "Alloy Glass Theme" and those don't look as bad because the active color is bright color.
This color change seems non-intuitive; I really do not like black text on dark grey for my active editor tab. On my LCD screen I keep the brightness down low and it is actually hard for me to read the tab text when I'm slouching in my chair; Ok, maybe this will encourage me to situp straight with my eyes perpendicular to my LCD at all times. My back thanks you for this change.
Even for the "Allow Default Theme" and "Alloy Glass Theme", it looks odd to me because on those, when the editor doesn't have the focus, the active tab is almost white, lighter than the non-active tabs, but when the editor has focus, the active tab is bright color, darker than the non-active tabs. The problem sticks out more with "Alloy IDEA Theme" because it is almost greyscale so color is eliminated from the equation.
In 7.04, the active tab is always colored lighter shade than non-active tabs. In 7.04 IDEA editor tabs look very similar to Firefox's tabs on windows. Firefox does have slightly more contrast between the lighter shade for the active editor tab and the darker shade for the non-active tabs, which I think helps make the active tab stand out better.
Changing the color to reflect the editor's focus state seems to be solving a problem that no one every had. I never had an issue before except for the lack of contrast between the active and non-active tabs noted above.
Now the active tab changes colors when doing all kinds of things -- even accessing the menu bar changes the tab color, which seems ridiculous. I"m trying to imagine if some other application like Firefox works like this.
While the behavior may be technically correct in showing how the editor temporarily gives up focus while the menubar has it, only to regain focus after you are done clicking Edit->Copy or whatever, it is just kind of pointless, and is creating a distraction to the eye.
Also, over remote desktop, flipping the tab color is costing me a few more milliseconds of my time now everytime I click out of the editor.
My suggestion is to go back to 7.04 tab colors, don't flip the color when the editor loses focus, and look into increasing contrast between active tab and non-active tabs, i.e. make active tab a little lighter and/or make the non-active tabs a little darker.
If you must have this behavior, then I suggest you rethink the three colors being used for active infocus tab, active out-of-focus tab, and non-active tabs. The non-active tabs should always be darker than the active one, whether it is in-focus or out-of-focus. The difference between in-focus and out-focus should be more subtle than the difference between active and non-active.
Or at the very least, please to fix Alloy IDEA Theme which seems to be the worst off for this change. I didnt' go through all the themes; There could be others with the same problem.