On my zenphoto administration edit page the album thumbnails are too small. Via properties(right mouse click) the address points to the 143x95 width thumbnail but the thumbnail now is 72x72 width.

How can I repair/adjust this?

TIA

You mean on the albums list when you clicked on the "edit" tab? These thumbs should actually be around 43x43px (and are for me) and I do not remember them being bigger any time. However their real size is 100x100px which should probably also not be on that page (this is the size of the image thumbs on the images edit page)..