XWiki S5 Presentation Abnormal in Opera and Konquer

Hi We are using XWiki Version 0.9.840, today we had create a presentation using the XWiki S5 presentation tool, and we found that when lunch the presentation in Opera Web Browser it only display the outline but not the slide show, the slide show is only displaied in the full screen mode in opera, and the problem here is the navigation button on the lower right is missing and there is no way to switch the slide (e.g. single click on the slide). Also we have tried the same presentation in Konquer, but in konquer it shows blank page when launch, and only one slide in the full screen mode in konquer, and if click any where, it returns to blank page. anyone has ever experienced this wierd problem? any suggestions? Muzi