I used to discuss the WordPress 2.5 display anomaly under widescreen in an article, almost all of which are designed for 1024x768, and widescreen displays for 1440x900 will show only the left part, using unusual awkward operation, This problem is not in version 2.3, so for widescreen display users, you can modify the admin CSS to achieve a good viewing effect.
After some research, found that changes to become a widescreen version is not difficult, the modification is very simple, is to edit wordpress\wp-admin\css\global.css, find lines 159th and 166th, will max-width:980px; and Max-width: 950px; modify to max-width:1400px; (or max-width:98%;).
The effect of the modification before the display in 1440x900 is as follows, which shows that the interface is awkward.
After modification, the effect of the display under 1440x900 is shown below, and the result is much better than the original image.
If you are using 1440x900 's display resolution, you might as well make some changes to make the interface look better.
English version: WordPress 2.5 widescreen version