Thanks Mathias, these are 2 pics of MC after startup (+cold boot), #1 is how it loaded, #2 is how it is once I rmb & 'restore'.
This time it isn't much but it is still something I don't think should occur + I haven't resized the main window.
For the rename dialog - the pics in the post above show that the column width divider goes far left as default, previously it would be more like a 50/50 split between the old & new name fields. Now I have a big whitespace field that is irritating for long name view.
I wonder if it is related to the VGA driver, I know sometimes a 'tweak' by the manufacturer in there can be a root cause of dialog draw issues.
I updated that recently, now using nvda 382.53-desktop-win8-win7-64bit-international-whql.