kzidek

Tried, as usual, with XP-Pen Star03 (Ugee M708) tablet and the high precision tablet input enabled. (latest driver: Dec 29 - 2016 - V8.1.2016.1002, WinTab32 V8.1.2016.906 / 10x6”, 2048-levels, System: Windows 8.1 x64 + 16GB RAM + Geforce 755M + SSD).
Problems with a tablet are only with AD Beta - other apps (most of which is using high-precision "Wacom" tablet input) works fine (Rebelle, ClipStudio, Sketchbook, Krita, ClipStudio, Photoshop).
Vector brush (tried to create a line from left to down-right - screenshot) creates this huge amount of curves (selected a few to show where they lead outside a canvas). Drawing with pixel brush slows the application down with stroke slowly appearing (minutes) combined with a heavy processor and memory load that can go up to 8GB or more - screenshot). The AD after this does not close completely - the window disappears, the CPU load also but the memory stays full (screenshot). It is necessary to terminate the process => no crash log.
Progress on another bugs is amazing and I'm really excited about this version. Thanks for this software.

The application does not freeze or use more memory than normal. It is fine and stable, but the line quality in Pixel Persona is unusable. I'm primarily focused on digital painting which I would like to completely do trough AD, but it is not possible yet. Images - AD (High Precision disabled + Star 03) versus Clip Studio and Rebelle side by side with tablet settings.

The application does not freeze or use more memory than normal. It is fine and stable, but the line quality in Pixel Persona is unusable. I'm primarily focused on digital painting which I would like to completely do trough AD, but it is not possible yet. Images - AD (High Precision disabled + Star 03) versus Clip Studio and Rebelle side by side with tablet settings.

I saw an earlier post about possible driver problems with the newer releases (I'm using 1.5.2.58 at the moment with no problems) and have encountered a rather serious problem with the newest beta. Quite possibly because I have an uncommon (in the U.S. at least) drawing moniitor. In this case it's a Ugee 2150 (UC Logic type device).  All other recent software seems fine with the driver provided (from Ugee.net - current windows drivers April of 2017 although it looks like it really dates back to late 2016).
 
In any case, using the mouse works fine on the monitor.  However touching the screen with the stylus seems to cause the rapid generation of a large number of line segments back and forth (hundreds of curves) going from the document frame to the lower left hand corner of, presumably, off somewhere down there.  Let it go too long and you have to reboot the PC.  Task Manager shows AD in a tight single CPU loop.
 
Perhaps reported elsewhere but I couldn't find it.

Tested the new beta - 1.6.0.71 with same results as described in post #1 in this thread - Application is freezing and exhausting all available memory.

I have tried the new beta with my XP-Pen tablet and I encountered a few issues.

1] Few times staring application and creating a new document (using a tablet) created a blank document with a guide randomly placed in it.

2] Working with tablet causes affinity designer to hard-freeze. I have tried to drawing in Pixel Mode. In log is a line: WinTab: Failed to get tangent pressure info. Creating small resolution file (Web - 1280x700) allows me to sometimes draw (with pressure sensitivity), larger files (A4) leads to application freeze after a partial stroke.

My tablet is XP-Pen Star Series 03 with the latest driver (Dec 29 - 2016 - V8.1.2016.1002, WinTab32 V8.1.2016.906) (10x6”, 2048-levels). System: Windows 8.1 x64 + 8GB RAM + Geforce 755M + SSD. Tablet works well in Photoshop/Clip Studio/Krita/Rebelle etc. In release version of AD is the "drawing experience" same (not so good) as with my Wacom Intuoso CTL-480.

I have included a screenshot. In the screenshot, I have compared lines that I managed to capture from new beta to release version. When it is possible to draw, the line quality and improvements are amazing!
The beta also sometimes breaks the stroke in the middle (lines that aiming outside the canvas). Happens mostly with a fresh canvas, less often after some time. The small straight line at the beginning of stroke is less present, but sometimes it is still there. Non-round brushes (more complex) mostly leads to a hard freeze.

For me actually the new driver (6.3.20-3) improved a brush behavior in AP/AD. At least in a case of "brush lag" - the response has improved a little bit, but not disappeared completely. Drawing of short and thin lines (for example) is still a real challenge. The line "ugliness" is also still the same and needs to be fixed for serious work. (https://forum.affinity.serif.com/index.php?/topic/30426-wobbly-lines-ad-15143/?p=147697). In other applications I did not notice a change or any delay (Sketchbook, Clip Studio Paint etc.).
 
Rendering GPU: Geforce 755M (Driver 376.19).Tablet: Wacom Intuos PS CTL-480 (Driver 6.3.20-3), Windows 8.1 64-bit, SSD.