Stu

@hardhub , @mikedld , @ckerr : Qt 6 [does not support](https://doc.qt.io/qt-6/supported-platforms.html) Windows 7 or 8, and looking at the "qwindows.dll" file that Transmission 4.0 ships-with reports version 6.4.0.0. As such...

@hardhub: if you need an up-to-date Torrent client for _Windows 7_, [qBittorent](https://www.qbittorrent.org/download.php) still works... just make-sure you download an installer that says "Uses Qt5" next to it. Similar to _Transmission_,...

@mikedld : if there is anything we can do, let us know. However **Event Viewer** doesn't detail anything other-than the original error-message ("The application was unable to start correctly (0xc0000005)....

Until it has been decided whether a Qt5 build for Windows 7 and 8 will be offered, can I at-least suggest someone updates the "Downloads" page please to avoid any-further...

@kjk : perhaps consider merging this issue into #3802 and just leave one primary ticket open to deal with all of the UI issues in the new dark-themes?

@Tharn: fair-enough if you think separate tickets would be best... though the general-theme of this ticket and 3802 (along with a handful of older, since-closed ones I've noted below) is...

Yes, same issue here with the new themes. In "Light" mode, things look correct (the UI appears the same as it did in the 3.4.6 version I used before updating)....

@GitHubRulesOK , @actimem : Just to clear-up any possible confusion here on what the issue is, perhaps another screenshot would help:  That shows how the toolbars look in both...

I'm using v4.2.168 of the AdGuard Browser Extension and can confirm it is slower to refresh a page after clicking the "protection switch" to enable or disable filtering, yes --...

UPDATE: I've just tried installing a rival ad-block extension into Firefox (whose name sounds-like "blue-jock, horror-tin") and that one _has absolutely no-issues_ in my Firefox -- all eight sites loaded...