zetah:
> When scrolling with mouse (either fast or slow, it doesn't matter) editor window blinks for relatively long periods. It flickers too much.
> Is there any workaround for this behaviour.
Video performance is going to depend on your video drivers and versions of various components including GTK+. My Xubuntu 12.04 installation performs similarly to the previous Xubuntu.
I won't be working on this.
> Also I'd like to know if status of gtk3 can be described as experimental and preferred way of compiling SciTE would be without using gtk3 switch?
No, GTK+ 3 has been working quite well. I do not anticipate Linux or GTK+ releases by building with pre-release versions so there will be some lag between a new release of GTK+ and a supporting release of Scintilla. There would be some benefit to building and testing against GTK+ pre-releases but I don't have the time to do this.
I'm particularly displeased by GTK+ sending smooth scroll events to Scintilla when it hasn't been asked for them by setting the GDK_SMOOTH_SCROLL_MASK.
Neil