Hi, We developed a custom tool on our Galaxy site. This tools' result is a html file with two frames. (Attachment is an example) Previously I can view the result perfectly when I click on "Display data in browser" icon on that data in history panel. However, we updated with the newest galaxy-dist code yesterday and then the HTML result can not be displayed in Galaxy normally. Neither frames can be seen in Galaxy's main panel now (middle frame, the URL looks like ..datasets/xxxx/display/?preview=True) The html file with two-frames displays nicely on old Galaxy code but doesn't display at all on the latest one. Does anyone know what may cause this problem? Thanks! -- Best wishes, Hanfei Sun