In the preferences dialog under "Transfer" I have the "replace \:?..." checkbox checked.
If I try to open or edit a file with a : (or any illegal character for that matter) in the file name it errors out. The file gets downloaded to the temp directory correctly with the file name changed, but it then tries to open/edit it with the original name. Shouldn't it use the converted name? How difficult would it be to map the old and new names?