When specifying a disk image file, one cannot specify the size unless one browses and inputs a new file name in the browser. THEN the size selector becomes unlocked. One cannot just type in a new file name and select size.
The code for managing the widget validation/events here was badly messed up, will fix up to listen for & process change events on the filename text field too.
In addition to the behavior detailed in the original bug report, I also noticed that after the filesize selector is active, it stays active no matter which radio button is selected. Steps to reproduce: 1) Select "Simple File" radio button and click "Browse..." 2) Enter any new file and click "Open". Note that the File Size selector is now active. 3) Select the "Normal Disk Partition" radio button. The File Size selector remains enabled even though it is not relevant to the current radio button.
The bug in comment #1 is fixed in rawhide with virt-manager-0.2.2-1.fc6 The bug in comment #3 is not yet fixed. Please, please, please only *ONE* bug report per ticket.
The 2nd issues reported in the 3rd comment is now fixed in virt-manager-0.2.3-1.fc6 which will appear in next rawhide push