Preview.app renders certain PDF text illegibly

Originator:fjarlq
Number:rdar://25114681 Date Originated:11-Mar-2016 12:59 PM
Status:Open Resolved:
Product:macOS Product Version:10.11, 10.12
Classification: Reproducible:Always
 
Summary:
When viewing the attached PDF file using Preview.app, the header text is illegible. See the attached PNG screenshot for example.
PDF: http://www.csis.pace.edu/~ctappert/dps/pdf/ai-chess-deep.pdf
Screenshot: http://imgur.com/0Wnddxw

Steps to Reproduce:
1. Open the attached `ai-chess-deep.pdf` file using Preview.app.
2. Note the illegible header text, especially on the first and fourth pages. (Compare with Acrobat or Chrome's PDF viewers)

Expected Results:
The text should be legible.

Actual Results:
The text is illegible.

Version:
OS X 10.11.3

Preview.app version 8.1 (877.7)

Notes:
The PDF is rendered correctly by both Chrome 49.0.2623.87's built-in PDF viewer, and by Acrobat.

Original source of PDF:
http://www.csis.pace.edu/~ctappert/dps/pdf/ai-chess-deep.pdf

Configuration:
I tested this on a Mac Pro (early 2008) and a MacBook (Retina 15" Mid-2014). I'm not aware of any relevant special configuration.

Attachments:
'ai-chess-deep.pdf' and 'osx-preview-pdf-bug.png' were successfully uploaded.

Comments

Matthew Day responds, 20-Sep-2016 03:08 PM

This same illegibility still occurs with macOS Sierra's Preview.app version 9.0 (909).

By fjarlq at Sept. 20, 2016, 10:19 p.m. (reply...)

Matthew Day responds, 14-Sep-2016 05:56 PM

I opened ai-chess-deep.pdf with iOS 10.0.1 using both the Safari and iBooks apps, and the rendering was legible.

However, on OS X 10.11.6 (Preview.app version 8.1 (877.7)) the illegibility still persists.

By fjarlq at Sept. 20, 2016, 10:18 p.m. (reply...)

Apple Developer Relations responds, 14-Sep-2016 03:40 PM

Please verify this issue with the iOS 10.0.1 GM and update your bug report at https://bugreport.apple.com/ with your results.

iOS 10.0.1 GM (Build: 14A403) https://developer.apple.com/download/ Posted Date: September 13th, 2016

If the issue persists and it's applicable to your bug report, please attach a new sysdiagnose captured in the latest build and attach it to the bug report.

iOS sysdiagnose Instructions:
https://developer.apple.com/services-account/download?path=/iOS/iOS_Logs/sysdiagnose_Logging_Instructions.pdf

iOS sysdiagnose Logging Profile: https://developer.apple.com/services-account/download?path=/iOS/iOS_Logs/loggingiOS.mobileconfig

For a complete list of logging instructions visit: https://developer.apple.com/bug-reporting/profiles-and-logs/

By fjarlq at Sept. 20, 2016, 10:17 p.m. (reply...)

Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at bugreport.apple.com before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!