Rad Controls Anti-aliasing issue

Greetings,

I've been using Rad controls  for a long time in my projects ( including mostly buttons, labels and gridview ) without facing noticeable GUI issues , though I sometimes face an Anti-aliasing issue of controls in all of my forms ( in a single project), and I have no idea what's the matter.

More surprising is the wired solution I found out to the issue and that's to add a random new rad control to one of the forms, such as  a button or a label. I attached 2 pictures that can illustrate the issue and the solution I described :

"Before.jpg" illustrates a rad button with "Tahoma" font; there is Anti-aliasing issue (sharp edges of letters in Text)

"After.jpg" illustrates a rad button with "Tahoma" font and a fresh new rad button added to the form;  there is no Anti-aliasing issue

P.S :

1- The issue involves not just the rad button, but also labels, gridviews (and maybe some other rad controls too).

2- Font  can't be the cause of the issue as I've tried using different fonts and it didn't make any difference.

3- I don't manually (dynamically) set or unset the Anti-aliasing feature of the rad controls

4- The newly added Rad control must be present (and visible!) in one of the forms  to solve the issue, otherwise the issue remains.