Recently the visual look of Jenkins has changed a bit. It looks nice. However, when it comes to the job progress bars that are visible here and there, they no longer have a visible boundary, so especially if they're on a white background, it is no longer possible to see where the progress bar ends, and thus how far the build has come. This is mildly annoying, so I hope it is possible to make the size of the progress bar a bit more visible.

Here it is somewhat visible, if you're looking real close:

I think this is how they used to look, and apparently still do if you open the build page:

It's much more clear how far the build has come here.