tab area overlaps other items when longer than vertical tabs list height

tab area overlaps other items when longer than vertical tabs list height.
Check it by entering multi-value cck fields and keep adding "add another" value ..
Same behavior in other long content... e.g the location tab (location module)

It would be better if every tab longer than the tab list could move below those areas after main content, as the original add page behaviour.

It seems to be a css issue, it may be a calculated value that stops .vertical-tabs .vertical-tabs-div height in tab list height and not a dependent "auto" like
.vertical-tabs .vertical-tabs-div {
height:auto;}
Is that right?