Viewer having siezures since v 9.11

zencricket · 07-10-2026, 10:46 AM

I'm using an M1 MacBook Air with macOS Tahoe v 26.3.1 (a). Since installing the 9.11 upgrade some epub (downloaded from websites using FFF plugin) books, both new and ones that I have had previously, have developed the shakes. The text jitters or skips back a page. I have been able to work around it to keep reading by paging forward several and then back to get it to stop. Maybe you remember a time when web browsers had trouble processing css rules and certain window sizes would get caught in a loop where the wrap point was sort of in-between and the text would re-flow constantly. This problem is like that.

zencricket · 07-10-2026, 10:48 AM

Just found the bug tracker. I will post there.

zencricket · 07-10-2026, 11:18 AM

Here is the link for the bug: https://bugs.launchpad.net/calibre/+bug/2160341

If you have experienced this issue, too, follow the link and click the Does this bug affect you? icon. It looks like a little yellow pencil.

–zc

DNSB · 07-10-2026, 01:05 PM

For what it may be worth, Qt and MacOS Tahoe have a rather long list of issues due to Apple's Liquid Glass rendering. You can try setting UIDesignRequiresCompatibility in the info.plist to YES to see if that corrects the issue. Basically, just lets you know that Liquid Glass/Qt is the issue.

See Qt on macOS 26 Tahoe and UIDesignRequiresCompatibility for more information.

07-10-2026, 10:46 AM	#1
zencricket Junior Member Posts: 8 Karma: 10 Join Date: Jul 2024 Device: kindle paperwhite	Viewer having siezures since v 9.11 I'm using an M1 MacBook Air with macOS Tahoe v 26.3.1 (a). Since installing the 9.11 upgrade some epub (downloaded from websites using FFF plugin) books, both new and ones that I have had previously, have developed the shakes. The text jitters or skips back a page. I have been able to work around it to keep reading by paging forward several and then back to get it to stop. Maybe you remember a time when web browsers had trouble processing css rules and certain window sizes would get caught in a loop where the wrap point was sort of in-between and the text would re-flow constantly. This problem is like that.

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07-10-2026, 10:48 AM	#2
zencricket Junior Member Posts: 8 Karma: 10 Join Date: Jul 2024 Device: kindle paperwhite	Just found the bug tracker. I will post there.

07-10-2026, 11:18 AM	#3
zencricket Junior Member Posts: 8 Karma: 10 Join Date: Jul 2024 Device: kindle paperwhite	Here is the link for the bug: https://bugs.launchpad.net/calibre/+bug/2160341 If you have experienced this issue, too, follow the link and click the Does this bug affect you? icon. It looks like a little yellow pencil. –zc

07-10-2026, 01:05 PM	#4
DNSB Bibliophagist Posts: 53,036 Karma: 181147351 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	For what it may be worth, Qt and MacOS Tahoe have a rather long list of issues due to Apple's Liquid Glass rendering. You can try setting UIDesignRequiresCompatibility in the info.plist to YES to see if that corrects the issue. Basically, just lets you know that Liquid Glass/Qt is the issue. See Qt on macOS 26 Tahoe and UIDesignRequiresCompatibility for more information.