This happened on Mozilla 1.0, using the LoFi theme. I close tabs using the middle mouse button. WHen I click a tab to close it, more often than not the site that was in the previous tab opens in the current one. Or it goes to look up some nonsensical URL. I am using SuSE Linux 8.0 Personal, straight off the shelf.
Dupe of Bug 107147, "Using middle button to close a tab conflicts with using it to open URL", please mark.
In fact a dupe of 107147 (which was recently fixed :-) ). *** This bug has been marked as a duplicate of 107147 ***
marking verified as a duplicate. if you decide to reopen this bug, please clarify why. search string for bugspam removal: SalviaGuaranitica