summary kinda says it all. The annoying case is if you put in a size greater than the dialog value for "Fill all space up to", then you get an error. For instance, if you put in 700MB for the Size field and the "Fill all space up to" dialog is set to 600MB (note, only 500MB avail on the disk) your error is "the size of the requested partition (size=700MB) exceeds the maximum size of 600MB." IMHO, the Size field only really makes sense if "Fixed Size" is the selected option, so I'd rather see the Size field made the dialog for that option rather than its own separate dialog.
The Size field is the starting point for any growing allocations as well, so this wouldn't make sense in the current UI. In a future release we could make this clearer cause it seems to confuse people.
could a simple change for this release be to change the label to something like "Starting Size" or something along those lines? Now that you've explained it, I better understand the dynamic. Optionally, if you don't wanna change the labels, just let me know and I'll switch this to anaconda-help and see if maybe we can get the online help to better explain the dynamic? I totally agree with something of a re-work for future releases, but I'm also hoping we can get something in the way of better explanation of the current situation out to the user :) just a thought - by no means critical obviously, just trying to help make things more idiot-proof as the world keeps inventing better idiots ;)
There are better callbacks in place now to make this act saner.