possible froyo market bug?

Well I just tried installing some new apps just now, and all of a sudden I get an error saying I don't have space to install it. According to my OS i have 300mb available, and I even uninstalled s bunch of other apps. Anyone else run into this?

 

I installed tunewiki which installed fine, then I tried to install mixzing which gave me the error.

 

So it was trying to download the app straight to my SD card. I deleted one song and boom it let me install mixzing

 

How can I stop it from doing that?

 

Can anyone help me? I need the market to dl to my internal memory