Color rectangle around tables on ERR diagram (no replies)

I had create tables on ERR diagram. Color frame surrounds each table. And this frames changes color at any action on diagram (at dragging and selecting tables and relations, at clicking to any part of diagram window etc.) How can i disable this rectangles? Here screenshot:
http://www.glowfoto.com/static_image/21-022220L/5769/png/10/2010/img6/glowfoto
OS Slackware13, WB had installed from source, version 5.2.28 and 5.2.29 have same strange behavior.