[quote user="alanr"]Just a thought - how did I fail to notice that a newer version of IErenderer had been released?[/quote]
There simply isn't an official notification mechanism like Pegasus Mail's homepage, so I'm (on the other hand) free to offer as many updates as necessary. The issues fixed in the latest version(s) only affected rather few people so far so there wasn't a need to announce it to a broader public either. But if you would like to stay informed just take a look at IER's official download site every now and then (the "subscription" might not work, but you might find external notification services on the Internet like Change Detection).
[quote user="alanr"]And how come only some emails exhibited this problem?[/quote]
Microsoft created a new browser for Windows 10 introducing some new formatting features which slowly seem to spread into web page creation tools and have their effects on older versions of IE as well which provides the rendering engine used by IER. I expect to see such issues reported more frequently in the more or less near future.
Michael -- IERenderer's Homepage PGP Key ID (RSA 2048): 0xC45D831B S/MIME Fingerprint: 94C6B471 0C623088 A5B27701 742B8666 3B7E657C