How to make borderline of the Eclipse theme tab smooth?

I have a problem with the Eclipse theme one of testers noticed recently - the borderline of Eclipse theme tabs is not as smooth as it should be.

Example:

Is there anything I can do to make it smooth?

Thanks in advance!

It must have been years since the last time I looked at that arch. Hm, I’ll have a closer look at what is going on here, although I’m not certain I want to see my old code… If I can enhance the arch I’ll upload a new version, maybe tomorrow. If not, then I’ll write a longer answer to your question.

Uploaded a new version. Should be a bit better, let me know if that is satisfactory to you.

If you want to try out your own ideas, copy the source and play around with the classes “Arch” and “ArchGradientPainter”. “Arch” is the class that describes how the right side of a tab looks like.

Thanks Beni. Is it in the “Preview 1d (6.Nov.2012)” build?

Yes it is in 1d. The changes were pushed 18 days ago into preview 1b.