I have an NVIDIA GTX 260 and using the previous version of GUIMiner, I had no problem with mining with phoenix. In fact, it gave me around 5 Mhash/s more than OpenCL.
And since you didn't get around to implementing my last requests, I'll just post them again..
1. The ability to remember previously used flags. There could just be a drop down menu button next to the text input field.
2. The ability to minimize to the task bar instead of only just the tray. (and when you press the X button, for it to actually close, not minimize to the tray) Options, please!
3. Also, regarding my request for keeping the window the same size and position when restarting the program - the same position is kept, however, the size still reverts to default. I have the window stretched a little more than default, horizontally, however, when I restart the program, it still goes back to the same default size. But the positioning of the window is fixed.
5. If you do add the ability to minimize GUIMiner to the task bar instead of only to the tray, could you make it so that it displays the MH/s in the title of the program, so that it is shown in the task bar. I'm not sure if you have ever used utorrent (I'm guessing you're familiar with it), just like how on utorrent you can have it so that it shows your up and down speed in the title bar, that's what I want with GUIMiner. For it to have the MH/s in the title bar, at the beginning of it (because if it's at the end of the title bar - ie after "GUIMiner - v2011-07-01" - then there won't be enough room to display it in the task bar.
So basically, I want it to be like this:
"##MH/s - GUIMiner - v2011-##-##"
Thanks for reading and your consideration.