k3b silently and cluelessly denies overburning

[Uqbar]

When (over)burning a DVD ISO, the application silently refuses to do it, until I enable overburning feature.
I would expect a warning dialog saying: the iso image is too large! Try enabling overburning.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: k3b 2.0.3-0ubuntu5
Uname: Linux 4.4.13-040413-lowlatency x86_64
NonfreeKernelModules: usblp nls_iso8859_1 rfcomm pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv ipt_REJECT nf_reject_ipv4 xt_multiport iptable_filter ip_tables x_tables bnep 8812au cfg80211 btusb btrtl btbcm btintel bluetooth uas usb_storage input_leds snd_hda_codec_realtek snd_hda_codec_generic intel_rapl hp_wmi snd_hda_intel x86_pkg_temp_thermal sparse_keymap snd_hda_codec intel_powerclamp coretemp snd_hda_core snd_hwdep kvm_intel snd_pcm kvm snd_seq_midi snd_seq_midi_event irqbypass snd_rawmidi crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw snd_seq gf128mul glue_helper ablk_helper cryptd snd_seq_device snd_timer snd mei_me soundcore mei serio_raw shpchp lpc_ich 8250_fintek mac_hid parport_pc ppdev lp parport autofs4 xfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 multipath linear hid_generic usbhid hid raid0 i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops psmouse drm ahci r8169 libahci mii wmi fjes video
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: KDE
Date: Fri Jun 24 11:13:02 2016
InstallationDate: Installed on 2016-04-22 (62 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: k3b
UpgradeStatus: No upgrade log present (probably fresh install)