Thanks so much for the speedy replies!
To be redundantly sure, I have my skin settings as follows in both vtourskin.xml and tour.xml -
tooltips_thumbs="true"
tooltips_hotspots="true"
This gets my tooltips working fine in Flash, thanks to the default showtext() action in vtourskin.xml:
<style name="skin_hotspotstyle"
onhover="if(skin_settings.tooltips_hotspots, if(linkedscene, showtext(get(scene[get(linkedscene)].title),SKIN_TOOLTIPS)) );"
Where I'm still having trouble is the HTML5 implementation. I'm trying to copy the example provided by Klaus in krpano tools 1.16.8/examples/xml-usage/tooltips, which works like this:
<!-- style for dragging hotspot -->
<style name="draghotspot"
distorted="true"
ondown="spheretoscreen(ath, atv, hotspotcenterx, hotspotcentery); sub(drag_adjustx, mouse.stagex, hotspotcenterx); sub(drag_adjusty, mouse.stagey, hotspotcentery); asyncloop(pressed, sub(dx, mouse.stagex, drag_adjustx); sub(dy, mouse.stagey, drag_adjusty); screentosphere(dx, dy, ath, atv); );"
onclick="oninterrupt(break); lookto(get(ath), get(atv));"
/>
<hotspot name="logo1" url="../../images/css3d_logo.png" style="draghotspot|tooltip" tooltip="CSS-3D Transforms Logo" ath="+33" atv="-16" />
<!-- the 'tooltip' style - show tooltip textfield and update positions as long as hovering -->
<style name="tooltip"
onover="copy(layer[tooltip].html, tooltip);
set(layer[tooltip].visible, true);
tween(layer[tooltip].alpha, 1.0, 0.5);
asyncloop(hovering, copy(layer[tooltip].x,mouse.stagex); copy(layer[tooltip].y,mouse.stagey); );"
onout="tween(layer[tooltip].alpha, 0.0, 0.25, default, set(layer[tooltip].visible,false), copy(layer[tooltip].x,mouse.stagex); copy(layer[tooltip].y,mouse.stagey); );"
/>
<!-- the 'tooltip' textfield -->
<layer name="tooltip" keep="true"
url="%SWFPATH%/plugins/textfield.swf"
parent="STAGE"
visible="false" alpha="0"
enabled="false"
align="lefttop"
edge="bottom"
oy="-2"
width="200"
autoheight="true"
background="false" backgroundcolor="0xFFFFFF" backgroundalpha="1.0"
border="false" bordercolor="0x000000" borderalpha="1.0"
borderwidth="1.0" roundedge="0"
shadow="0.0" shadowrange="4.0" shadowangle="45" shadowcolor="0x000000" shadowalpha="1.0"
textshadow="1" textshadowrange="6.0" textshadowangle="90" textshadowcolor="0x000000" textshadowalpha="1.0"
css="text-align:center; color:#FFFFFF; font-family:Arial; font-weight:bold; font-size:14px;"
html=""
/>
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I take it the 'tooltip' style provides HTML5 functionality. I doubt my need to add the 'tooltip' layer as it calls on Flash. Anyway, I've tried with and without this layer with the same same results -- working Flash tooltip, broken HTML5 tooltip.
Here's what I have now for my hotspot tooltips -- basically the default settings, plus my efforts to Frankenstein the HTML5 functionality:
From vtourskin.xml (defaults):
<!-- skin_hotspotstyle - style for the hotspots (note - the onclick event will be overwritten! the hotspots need to have a 'linkedscene' attribute to be clickable) -->
<style name="skin_hotspotstyle" url="vtourskin_hotspot.png" scale="0.3" edge="top" oy="0"
alpha="0.6"
distorted="true"
onclick="if(linkedscene, tween(scale,0.25,0.5); tween(oy,-20,0.5); tween(alpha,0,0.5); looktohotspot(); zoomto(1.5); loadscene(get(linkedscene),null,MERGE,BLEND(1)); skin_updatescroll(); );"
onhover="if(skin_settings.tooltips_hotspots, if(linkedscene, showtext(get(scene[get(linkedscene)].title),SKIN_TOOLTIPS)) );"
/>
<!-- tooltips textstyle -->
<textstyle name="SKIN_TOOLTIPS" font="Arial" fontsize="16" bold="true" italic="false" background="false" border="false" textcolor="0xFFFFFF" effect="dropshadow(1,45,0x000000,4,1);" fadeintime="0.1" fadetime="0.05" />
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From tour.xml:
<!-- the 'tooltip' style - show tooltip textfield and update positions as long as hovering -->
<style name="tooltip"
onover="copy(layer[tooltip].html, tooltip);
set(layer[tooltip].visible, true);
tween(layer[tooltip].alpha, 1.0, 0.5);
asyncloop(hovering, copy(layer[tooltip].x,mouse.stagex); copy(layer[tooltip].y,mouse.stagey); );"
onout="tween(layer[tooltip].alpha, 0.0, 0.25, default, set(layer[tooltip].visible,false), copy(layer[tooltip].x,mouse.stagex); copy(layer[tooltip].y,mouse.stagey); );"
/>
<scene name="scene_001-Nihiwatu2AerialPanorama" title="Villa Aerial" onstart="" thumburl="panos/001-Nihiwatu2AerialPanorama.tiles/thumb.jpg" lat="" lng="" heading="">
<view>...</view>
<preview>...</preview>
<image>...</image>
<hotspot name="spot1" style="skin_hotspotstyle|tootip" ath="-58.352" atv="24.513" linkedscene="scene_004-nihiwatuvilla3panorama" tooltip="Go to Villa 3" />
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Still no go in HTML5.
Worried I might have some conflict between showtext() and the 'tooltip' style functionality, I turned off showtext() for hotspots in tour.xml with the setting tooltips_hotspots="true".
Still no go in HTML5.
See for yourself at:
http://djunapix.com/blog/wp-conten…iwatu/tour.html
http://djunapix.com/blog/wp-conten…hiwatu/tour.xml
http://djunapix.com/blog/wp-conten…n/vtourskin.xml
For testing purposes, I'm trying a static text tooltip. Of course, the best solution would be one that returns the linkedscene title dynamically as part of the hotspot or tooltip style, within the skin template. Would I make this as an addition to the style 'skin_hotspotstyle'? Bascially I want to add an HTML5 version of...
onhover="if(skin_settings.tooltips_hotspots, if(linkedscene, showtext(get(scene[get(linkedscene)].title),SKIN_TOOLTIPS)) );
Any handholding to show a noob like me those ropes would be MUCH APPRECIATED! 
Thanks!!
Djuna