We have some images in the TAG which were generted with Dia a long time ago. These looks poor, since no antialiasing etc was available then. I brought back the deleted files in r31286. However, some of them are no longer in use. Others nees to be updated with the changes that was done manually to some images.
Hopefully, the last 4 commits should give a good result.
Created attachment 679 [details] Quality difference