Hi, I'm sorry about that. I don't (didn't) actually use the Plugin Dependencies plugin; I just thought it was a good idea so I coded the Depends: lines... wrongly.
The workaround to your problem is to either comment out the Depends: line in oik-nivo-slider.php or change 'oik' to 'oik base plugin'.
I'll leave Plugin Dependencies active until I've sorted them out in my development machine.
In the next versions of oik and oik-nivo-slider I've developed a slightly different solution that allows the plugins to be activated but not necessarily work. oik-nivo-slider will report a warning message. The idea being that a future version of the oik base plugin will be able to offer to perform the upgrades for you.
BTW: In the next version oik quicktags won't be a separate plugin.
You will be able to choose whether or not to have it active from the oik options > Buttons menu
Please let me know how you get on.