Hi there, These days I've devoted some more effort to the tooltips bug [1] and its workaround patch [2]. The motivation is that the current workaround involves a full UI and viewport expose (i.e. a full erase/redraw) that produces annoying flickering when the mouse is in the UI but outside the viewport (e.g. over the panel). Over time I've learnt to move the mouse pointer outside the panel and into the viewport to scroll without flickering (but probably I'm among the few that know this trick). So far (and despite the warning inside FLTK), I've experimented with a custom tooltip handling class, and a couple custom UI widgets, that seem to work well together (i.e. solve the problem without the workaround :) ). Testing revealed the workaround concealed another problem, which I don't remember whether it was detected before, and this is that viewport mouse events get "through" the panel UI!. How?, placing the mouse pointer over the panel (e.g. to the right of the Tools button, or even inside the Location), and scrolling a page full of links under it, will make the mouse pointer change to a hand, and the destination link appear in the status bar area. This bug is revealed by disabling the workaround: just apply the small attached patch. Clearly there's a viewport offset problem somewhere. Correcting it may save us lots of headaches in the future. Does anybody know or has a clue of where this may be happening? TIA. [1] http://lists.auriga.wearlab.de/pipermail/dillo-dev/2011-July/008494.html [2] http://lists.auriga.wearlab.de/pipermail/dillo-dev/2011-July/008515.html -- Cheers Jorge.-