iS there a problem with pdf's on Android?

[StephenG1CMZ]

Recently I have found many pdf's on the forum are unreadable on Android (using Chrome).
Here is a recent example
http://www.hpmuseum.org/forum/thread-11547.html

Whilst my Android pdf readers have never been reliable, the error message about attachment.php not being a correct format is new - and seems to be occuring on many pdf's from the forum.

Just me? Has anything changed on the forum or has my Android been "improved" again?

[SlideRule]

The original post is a reduced size {version 1.7 compatible} save from Acrobat XI Pro to version 9 of Acrobat. I can save in a lower format (4-7) and see if this is compatible with your needs. Send me a PM with an email address & I will return the effort with a reduced compatibility (pick from 4-7 please).

SlideRule

[Didier Lachieze]

No issue here with Android 6.0.1 and Adobe Acrobat app.

[SlideRule]

I updated the initial post to version 4 from version 9 in Acrobat.

[EugeneNine]

I've had issues with older pdf's and newer software, it seems pdf isn't as normal as adobe would like us to believe. Not just on one os but in general.

[StephenG1CMZ]

Just tried again. Android 5.0.2 still doesn't work.
Yet Android 6 - which is infamous for poor pdf support - does.
So I can read it on my tablet.