andrey.k., Unfortunately, there is no way to shoot a video now, but I will describe the problem in detail.
Device 840-2.
As for DropBox, it is impossible to log in. In Accounts & Sync ->Dropbox ->Login - the DropBox login page appears, I enter the logs and password, a very long pause, after which the message "timed out." Through the Browser - it’s also impossible to enter there. I suspect that because of reCapcha, mention of it is visible on the page, but the browser does not offer the action on reCapcha itself. Most likely, the application (not in the Browser, but in DropBox) also does not work because of this.
Additionally by DropBox: today I tried from a different IP address and a different network - I managed to log into DropBox, and reCapcha is not required from this other IP even in the Browser application. I suspect that the problem will pop up spontaneously for those for whom, for one reason or another, DropBox will require the introduction of reCapcha.
About the font menu. In the new program for reading, I call up the menu for changing fonts (capital letter “A”), then I select my fonts, somewhere in half the cases the font is not selected, the menu closes and just a reading page appears with the same font, as if I just closed font menu. And here it’s not a matter of accuracy, I don’t accidentally click anywhere, the experience with PB has been over 10 years.
Another bug. If you read PDF / DJVU in a new reader and select the "Crop" field cropping mode, then a menu appears where you can move the page borders with your hands, as it was in the old program, however, the problem is that instead of the displayed page in half the cases a gray box is displayed on the page, so you have to move the cropping borders blindly.
If you need any clarification, ask, I will answer.
If I find any more bugs - let me know.