Adobe Support Community

Acrobat DC Feb 25, 2021, Optional Update Windows and Mac _ Bug fixes

A follow-up update to Acrobat and Reader DC Feb 2021 release for Windows & Mac 21.001.20142 Optional update, Feb 25, 2021, is available which addresses some important bug fixes that have been reported in the Feb 09, 2021 release.

This release is a hotfix patch for Acrobat and Reader DC  that addresses some important bug fixes and is applicable for Acrobat and Reader DC Continuous track.

Adobe recommends installing and updating Acrobat and Reader DC for Windows and Mac to the latest version 21.001.20142, as quickly as possible.

Install the updates from the help menu> select check for updates. Reboot the machine after installing the updates.

For detailed information about the latest update, please refer to the Release notes.

Bug/Issues fixed:

Search

• Not able to Find/Search text in PDF documents

Security-Signatures

• 4324697: Crash on Opening a particular Signed PDF

An error message is incorrectly displayed and associated with a valid digital signature.

A follow-up update to Reader DC Feb 2021 release for Windows & Mac 21.001.20140 Optional update, Feb 22, 2021, is available which addresses the "An error message is incorrectly displayed and associated with a valid digital signature." bug fixe that have been reported in the Feb 09, 2021 release.

This hotfix patch is applicable for Reader DC Continuous track.

Adobe recommends installing and updating Acrobat and Reader DC for Windows and Mac to the latest version 21.001.20140, as quickly as possible.

Install the update from the help menu of Acrobat Reader> select check for updates. Reboot the machine after installing the updates.

For detailed information about the latest update, please refer to the Release notes.

Thumbnail preview of PDFs not displayed in Windows Explorer - Fix

After the Feb 9, 2021 release of Acrobat & Reader DC version 2021.001.20135, Thumbnail preview of PDFs were not displaying/generating in the Windows Explorer.

The thumbnail preview of PDFs was not displaying/generating correctly in the Windows Explorer even though the Enable PDF thumbnail previews in Windows Explorer option was selected in Edit > Preferences > General.

Workaround: 

Note: This is a temporary workaround, Adobe is working to fix this issue asap.

1. Quit Acrobat Reader DC if it's already running.
2. Open the Registry Editor: Go to Run (Windows menu + R), type regedit.exe in the Open field, and then click OK.
3. In the Registry Editor, create the following key:

Path: HKEY_CURRENT_USER\SOFTWARE\Adobe\Acrobat Reader\DC\AdobeViewer

Key: EULA

Type: REG_DWORD

Value: 1

4. Close the Registry Editor.
5. Open the Task Manager in Windows by doing one of the following:
   1. Right-click on the taskbar at the bottom of the screen and choose Task Manager.
   2. Press Ctrl + Alt + Delete keys on your keyboard and then choose Task Manager.

6. In the Task Manager window, choose the Windows Explorer process, and then click Restart.

7. Close the Task Manager.

8. Open Windows Explorer and check the thumbnail previews of PDFs.

Acrobat & Reader DC Feb 2021 Optional Update Windows and Mac _ Bug fixes

A follow-up update to Acrobat and Reader DC Feb 2021 release for Windows & Mac 21.001.20138 Optional update, Feb 15, 2021, is available which addresses some important bug fixes that have been reported in the Feb 09, 2021 release.

This release is a hotfix patch for Acrobat and Reader DC that addresses some important bug fixes and is applicable for Acrobat and Reader DC Continuous track.

Adobe recommends installing and updating Acrobat and Reader DC for Windows and Mac to the latest version 21.001.20138, as quickly as possible.

Install the updates from the help menu> select check for updates. Reboot the machine after installing the updates.

For detailed information about the latest update, please refer to the Release notes.

Bug/Issues fixed:

Viewer

• An error comes up on opening PDFs in Reader when trying to open from OneDrive’s Personal Vault Folder

Sandbox

• Unable to save PDF file to Citrix ShareFile drive
• Unable to save digitally signed PDF to Box drive when “Enable Protected Mode at startup (Preview)” is enabled

Browser

• Error “PDF browser plugin is missing, reinstall the application” shown on opening PDF in browser
• Hang on connecting to Global Protect tool with error “PDF browser plugin is missing, reinstall the application” shown in the background

Printing

•  “Choose Paper Source by PDF page size” checkbox is not working while Protected Mode is enabled

Search

• Acrobat is not able to load the associated index with a PDF file

Installer

• Getting Error 1722 while installing 32-bit Reader or on applying latest Reader patch

Fill & Sign

• Reader: Nothing happens on clicking “Save a copy” button after adding a signature through Fill and Sign on a Reader extended document

Editing

• Cell content from Excel app is getting copied as an image to the Edit app

Unable to print by PDF page size after updating Acrobat DC or Acrobat Reader DC to the latest version.

This is to inform, we don't need the below-mentioned workaround any more. Please keep the protected mode enabled. 
This bug has been fixed with the fix patch released: https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/continuous/dccontinuousfeb2021qfe.html#dccontinuousfebtwentytwentyoneqfe 
4324342: “Choose Paper Source by PDF page size” checkbox is not working while Protected Mode is enabled."

On Windows only

While printing a PDF from Acrobat DC or Acrobat Reader DC, even though the Choose paper source by PDF page size option is selected in the Print dialog box, the document gets printed with the default page size.

Workaround:

Note: This is a temporary workaround. Adobe is working to fix the issue. We recommend enabling the Protected Mode after you have printed your documents for the security advantages it provides by sandboxing application processes.

1. Disable the Protected Mode in Acrobat DC or Acrobat Reader DC
2. In Acrobat DC or Acrobat Reader DC, go to Edit > Preferences.
3. From the Categories on the left, select Security (Enhanced).
    

   

    

    

4. Uncheck the option Enable Protected Mode at Startup, and then click OK.
5. Quit Acrobat DC or Acrobat Reader DC.
6. Relaunch Acrobat DC or Acrobat Reader DC. The Choose paper source by PDF page size option in the Print dialog should work as expected.
   
   You may also Read this Help document: https://helpx.adobe.com/acrobat/kb/unable-to-print-using-choose-paper-source-by-pdf-size.html