Plugin tab oddness

I am seeing a weird issue in 1.5.

I have two plugins activated, photopress and bStats. Currently the bStat tab appears before the photopress tab in both the Manage and the Options sections. If i click on either tab, i see the Photopress page (which is the last tab). So, if i click on bStats tab in the Options section, i see the Photopress options page !!!!

If i got to the plugin dir via ssh, and rename the bstat.php file to something like zbstat.php, making it appear after the photopress plugin on the tab bar in both Options and Manage, then the situation is reversed; clicking on the photopress tab (which is now 2nd to last) shows the bstat page !!!!

Does anyone know what the **** is going on here ?

Olly