I have had some problems with the module actions (the solpartactions) before. It was not completely clear why...

(DNN 4.4.1)

Now I have been able to reproduce them.

Problem:
In certian conditions, if you add multiple modules to a page the actions menu moves more and more away from the arrow that makes it appear.
(If you hover the arrow of a module further down the page the distance increases)
This happens on pages with a scrollbar.

Reproduce:
-Use the default blue skin - Horizontal Menu - Fixed Width
- Put a div with class="maindiv" around the skin
- Add this to skin.css:
.maindiv{
height:500px;
overflow:auto;
}
-Add 5 text/hml modules with a long text to a page and apply the skin to the page.

You get a scrollbar on the left with the page in it, the module action menu's appear where they should be if the page wouldn't scroll.
The last ones are not accessible.

(I know you normally wouldn't create a skin like this, but i does show the problem)