Click File->Open, ensure "Show Preview" option is not selected. All directory/filenames are visible. Click on "Show Preview". No preview is displayed, almost all directory/filenames listed are suddenly truncated and have ... in them. If one attempts to resize the open file dialog window, then all directory/filenames become fully expanded again. Hover with a mouse over them - and it is as if I launched Paint and used an eraser tool - everything under the mouse gets erased.
$ cat /etc/os-release NAME="openSUSE Leap" VERSION="42.3" ID=opensuse ID_LIKE="suse" VERSION_ID="42.3" PRETTY_NAME="openSUSE Leap 42.3" ANSI_COLOR="0;32" CPE_NAME="cpe:/o:opensuse:leap:42.3" BUG_REPORT_URL="https://bugs.opensuse.org" HOME_URL="https://www.opensuse.org/" $ rpm -qa| egrep "kate|kdelibs|workspace" libkate1-0.4.1-26.5.x86_64 plasma5-workspace-debuginfo-5.11.4-370.3.x86_64 plasma5-workspace-branding-openSUSE-42.1.1-261.1.noarch plasma5-workspace-5.11.4-370.3.x86_64 kdebase4-workspace-liboxygenstyle-4.11.22-5.29.x86_64 plasma5-workspace-lang-5.11.4-370.3.noarch kdelibs4-core-4.14.38-59.2.x86_64 kdelibs4support-5.40.0-159.21.x86_64 kate-17.12.0-2.9.x86_64 liboggkate1-0.4.1-26.5.x86_64 kdelibs4support-lang-5.40.0-159.21.noarch kdelibs4support-debuginfo-5.40.0-159.21.x86_64 kdelibs4-4.14.38-59.2.x86_64 kdebase4-workspace-libs-4.11.22-5.29.x86_64 plasma5-workspace-libs-5.11.4-370.3.x86_64 kdelibs4-branding-openSUSE-42.1-10.1.noarch kate-lang-17.12.0-2.9.noarch kate-plugins-17.12.0-2.9.x86_64 plasma5-workspace-wallpapers-5.11.4-108.1.noarch
Example of "eraser tool" effect - see how "lost+found" looks after a mouse hover. https://photos.app.goo.gl/H5meBa0RVqi25DIw1 This only started happening very recently, after an update to latest KDE packages from OBS.
This is a file dialog issue. I hope that is the widgets part of kio.
*** This bug has been marked as a duplicate of bug 387956 ***