it is a bit controversial

Is it that recently with version 6.1 users are having much more issues . CASEAII is found to be giving new problems every day , these are not problems of program or logic , but those related to graphics etc. Can some one share the views ?

c2 uses a commercial graphics library/engine. As that library is updated by the vendor, we incorporate it into the next versions of our software products. This can result in problems with these new versions on some machines, depending on the graphics environment.

Typically, graphics issues can be resolved by updating your graphics driver (directly from the manufacturers website - NOT Microsoft's site).