Fiddler Ideas

Latest update worked a treat for me! Thanks!

Just got the latest update (v5.0.20181.14850). The UI is better but is still a bit blurry when viewed at 150% on my 4K.

Open the Fiddler.exe Properties window, switch to the compatibility panel and find system enhanced DPI zoom to resolve

I want to go back to previous version. How do I do that? This is terrible.

Installing v5.0.20173.50948 fixes the issue for me without having to do anything with -dpiAware. -dpiAware did improve the latest version, but there were still slight issues where tabs seemed too short in height.

1. Resolution 2880 x 1800, scaling = 200%
2. No
3. 10.1709.16299.309
4. .NET Framework 4.7.1
5. Yes. 5.0.20173.50948

A few more interesting observations. 

The current and previous release both have the same behavior when using -dpiaware flag. I'm seeing that with a larger font set under appearance, text gets clipped inside the elements - looks ugly but works. The previous version v5.0.20173.50948 handles text size changes without the -dpiaware flag much better.

My primary monitor is at 2560x1440. Secondary (laptop screen) is at 1920x1080. DPI at 125%

v5.0.20173.50948 for .NET 4.6.1
Built: Thursday, December 14, 2017

64-bit AMD64, VM: 43.0mb, WS: 85.0mb
.NET 4.6.2 WinNT 10.0.16299.0

I installed the below version and no issues.

v5.0.20173.50948 for .NET 4.6.1
Built: Thursday, December 14, 2017

64-bit AMD64, VM: 46.0mb, WS: 92.0mb
.NET 4.6.2 WinNT 10.0.16299.0

DPI setting to 125% in Windows

I let it auto update to v5.0.20181.13826 and the issue immediately came back.

Using the -dpiaware flag fixed it!

This isn't a windows update problem. Fiddler was working today until I upgraded. the -dpiAware flag DOES make fiddler usable again but it's kind of messy. See attached. BTW: i did NOT use dpiAware on old version.

Answers:

1) 4K
2) Yes. Same. Same DPI and font scaling
3) win 10 pro 1709 build 16299.192
4) 4.6.1 (i think)
5) Yes. Prev version was fine. I update when the UI tells me to.
6) Yes. Makes it usable but still donked up a bit.

And least but not least

6. Are you running Fiddler with the -dpiaware parameter or not?

I rolled back to my previously installed version of v4.6.20173.38786 and the issues does not present itself.

We are not able to reproduce the problem to its full extent locally. So, it would be really nice if you guys could help us a bit further. Here are the six previous public versions of Fiddler. What would help us is:

1. What is the resolution of the monitor where Fiddler exhibits this problem?
2. Are there other monitors on the system? What are their resolutions?
3. What is the full Windows version?
4. What is the most recent .NET version installed?
5. Does any of the previous Fiddler versions behave differently? Which one?

I'm seeing the exact same issue. Hope be fixed asap.

Re: Tsviatko Yovtchev: just updated today. Not sure what previous version I was using, but I have autoupdates enabled and I was using fiddler earlier this week without having been prompted for an update. I assume the previous version worked.

The problems relies in the high-dpi awareness of Fiddler.

A temporary workaround is to suppress Fiddler high-dpi management going into the Fiddler.exe file properties:

• Compatibility Tab
• Check the option: "Override high DPI scaling behavior"
• in the combo box specify: "System"

In any case something has definitely changed in Fiddler or Windows since it never happened before.
The test must be done with high-dpi monitors and specifying a magnification > 100% (e.g. 150%)

HTH

I did install windows updates last night, but the Fiddler UI looked normal and prompted me to update, and it was messed up after the update.

Not sure what my previous version was, but my new version is v5.0.20181.13826

I had version 4.6.20173.38786 which I downloaded back in September. I updated it today after a popup let me know there was a new version.

It was a fairly recent version, I last updated about a month ago. Is there
a log which might include the version number I upgraded from?

What version did you guys update from? We haven't really changed anything UI related in the new release. It has to be some change in Windows I guess. I could provide an old version of Fiddler to test that theory. I just have to know which one.

Same thing here with 2560x1440 resolution. Font sizes are all over the place.