Version:           1.10.3 (using KDE 4.1.3)
OS:                Linux
Installed from:    Ubuntu Packages

The mix of where single and double clicks are needed when navigating through the directory structure to select a file to attach seems wrong and as well as being different to other applications, makes life difficult.

1. "Bookmarked" directories (on the left-hand side of the dialogue panel) require a double-click. There seems no reason why TWO clicks should be needed here; other applications (such as the Gimp and Firefox) only require a single click.

2. Files and directories displayed in the selection field only require a single click. Again, this is the reverse of how other programs work.

The main reason I consider this to be a problem is that if a file is single-clicked on, the dialogue is automatically submitted, which means that if I wanted to select more than one file in that directory, I have to re-open the dialogue to choose the next one.

Single-click submission CAN be suppressed by, for example, using <shift>+<click>, but as the behaviour of that action is buggy (http://bugs.kde.org/show_bug.cgi?id=180961) this is also un-satisfactory.

I would suggest that "bookmarked" directories should be accessible with a single click (or perhaps single or double as set up in the mouse configuration). On the other hand, when a file is single-clicked on, it should just be selected; the dialogue should not be submitted unless either the file is double-clicked on or the "attach" button is clicked. I'm not sure whether directories in the selection field should open with a single or double click; double would be more consistent with other applications, but I don't see it as being as important as the problem with files automatically opening on a single click.

I HAVE tried changing my mouse configuration to "double click" in case that made a difference and it doesn't seem to.