This specific issue happened with the Calibri font but we think this could also have been an issue with Consolas and Cambria fonts.
Removing the bitmap (EBDT, EBLC & EBSC) when subsetting resolved the issue. What I realized is that my new Mac (2017), even though I purchased all new programs (Microsoft suite and adobe acrobat pro dc,), Calibri is not install in.
Adobe Reader seem to be using these bitmap when rendering at specific zoom level. Also, you may go to Devices and Printers right click on Adobe PDF printer choose printer preferences from Adobe PDF settings tab uncheck Rely on system fonts do not use documents fonts Regards, Tariq Dar >Download calibri bold font free at, database with 114947 web fonts, truetype and opentype fonts for Windows, Linux and Mac OS. We traced back the issue to the bitmap font tables being preserved when subsetting fonts. When turning Text Smoothing option to “For Monitor” or “For Laptop / LCD Screen”, the issue disappear. It's for sale from here Calibri Font Family - (which is also linked to from Microsoft's Calibri info page, though I suggest just reinstalling Microsoft Office to get it. It's actually installed with Microsoft Office it's the official default font of Microsoft Office. Same text rendered at different zoom levels Rendering at 100%: Characters look good Rendering at 106%: Some Characters are invalid / funny / garbage / incorrect Calibri is not installed with Adobe products. Double-click the ARIBLK.TTF font file to open the font preview and display the version number. Locate the Arial Black font files in the C:windowsfonts folder. Text Smoothing Preference in Adobe Reader Solution 2: Replace Arial Black version (version 2.40) with previous version font files.
This is more noticeable when using the mouse to zoom.
When the Rendering Preference under Page Display for Text Smoothing is set to “None”, Adobe Reader seems to be having issue when rendering certain embedded fonts (true type font for instance) at certain zoom level. We first thought this was an Adobe bug but looking further into this issue, we found out that it was an issue with bitmap font tables being preserved by jWordConvert when subsetting fonts. We found today a weird issue in the way Adobe Reader DC and Adobe Acrobat render some embedded fonts at certain zoom level.