My top three annoyances about KDE 4.1 are as follows (in order of importance/irritability):
1) Desktop icons
Folder view is no substitute for being able to use your desktop as a collection of launch icons or a dumping ground (which I choose freely to do). I like to line up all my favourite icons around the left and top edges of the screen so that they are almost always within quick and easy reach (leaving the panel at the bottom and KMess & gkrellm on the right edge). Having a desktop without application/folder icons would be like not having a dashboard in a car. Folder view is no good for me because it gets obscured by windows I have open, and when I have to click the show desktop button just to see my desktop icons, then what used to be one-step process to access something is now a two-step process.
Also, I'd like to be able to draw selection rectangles around my desktop icons as well as right-click somewhere to align them to a grid (and a grid that's configurable so that there isn't a one-inch margin down the left hand side as there is in GNOME meaning that I can't line up my icons around the *edges* of my screen and keep them tidy). Currently my KDE icons don't line up to a grid nicely, so I'll probably cope, but this feature would be very nice indeed!
The annoyingly-tall handles on desktop icons - if I drag them out of a folder view - are pointless. I'm quite happy right-clicking to do non-obvious and occasional stuff to my desktop icons: KDE users typically aren't morons who rely on these hand-holding irritations. If I was a moron who couldn't cope then I'd use GNOME :-)
2) Dolphin
I like Konqueror (as I have it configured) but I can see that the days of a combined a web browser and a file manager are rightfully over, so I'll cope. However, Dolphin would be a joy to use if the following could be arranged (in the fullness of time):
- I was about to mention that the navigation bar needed a button to make the path editable, but I just discovered that clicking in the empty space to the right makes it so. Nice :-)
- I prefer the way Konqueror currently does not highlight the full width of the column and only makes the width of the file/folder the selectable area. Call me an old dog who can't be taught new tricks but this behaviour bugs me (though, I will prefer the current one-column selectable area to the full-row selectable area in Nautilus, don't get me wrong). If I want to draw a selection rectangle around a few files with short names, and the column is much wider, then having to start my selection rectangle further to the right just annoys me when I'm used to starting the selection in any whitespace nearby. Even if the compromise is just to add an option to enable this, I'd be happy.
3) Not being able to close windows by double-clicking at the top-right corner
Another from the "can't teach an old dog new tricks" department. Yes, I also close windows at the top-right, but sometimes I just double-click at the top-left (depending on where my mouse is). The closest way to close a window wins out, and KDE 4.1's GNOME-esque behaviour in this regard drives me nuts!
Looking back at these "gripes," none of them are show-stoppers because the alternative (GNOME) would be an absolute nightmare by comparison. So, I don't want to complain too much because KDE 4.1 is a positive step forward; it just needs more configurable options, which I'm sure will come.