I am using PSE 10 on a MAC OS 10.6.8
I have been using it for about 7 months and had no problems.
Sudeenly I can't select objects on a page. I get no selection handles.
select move tool (shortcut V) and check if the "auto select layer" and "show bounding box" options are checked. If it doesn't work, you can try right clicking the tool option panel and select "reset tool"