How to prevent Eclipse from showing the opened file in package explorer

somehow I've ended up in a situation such that when I navigate through source files with Eclipse, the Eclipse always selects (and expands) the opened file with package explorer. With this I end up

• losing my location on Package Explorer
• Having my Package explorer expanded and pretty confusing.

With brief googling/exploring on the preferences I couldn't find this one..

Eclipse version is 3.4 if that happens to matter.

Thanks in advance, Touko

Turn off the "Link with Editor" option in the Package Explorer toolbar.

(the left/right arrow icon, turned on here)