Display problem with SOPC Builder

Greetings everyone.

I am trying to get into NIOS II, however I am stuck at the first step: SOPC Builder. When I try to add/remove/collapse/expand components, the component list does not refresh. I must minimize and restore the SOPC Builder window every time I do an action to get the window contents refreshed. I am also unable to establish connections between the components, as the SOPC Builder won't draw any arrows or anything else on the "Connection" column. I can try randomly clicking there, and something will get connected to something else, as I can see from the error/warning/todo messages at the bottom -- if I minimize and restore the window to get it refreshed, too. However, since the "Connection" column still doesn't draw anything, I don't know what is connected to what.

This problem exists in 3 different PCs (with completely different hardware, 2 running Windows Vista and 1 Windows XP) I use. I am using Quartus Web Edition 8.1. I tried updating graphics drivers, installing latest Java runtime environment and reducing graphics acceleration from the control panel - none of these help at all.

I couldn't find anything at all related to this problem I'm having - neither here, nor in the Nios Community Forum, nor anywhere else on the internet. I am looking forward to hearing a solution to this problem. Thanks in advance.