I've just updated my WordPress Plugins Contest entries page with the new 1.1 release of the CG-FlashyTitles (sIFR) plugin. If you've had problems and were on 1.5 or 1.5.1, please give this a try -- I just overhauled some of the menu-install code to hopefully have better backwards-compatability.
In theory, the 'function already defined' stuff should now be gone, and the FlashyTitles main admin menu should now show up. Note that the FlashyTitles menu, when selected, only is 'highlighted' in 188.8.131.52 and beyond (I think) -- 1.5 and 1.5.1 don't highlight custom top-level menus properly.
Let me know if you have problems with this release, and I'll try to figure it out. ;)