In case the auto-notification didn't work for you:

The small and easy things first: The installer does now automatically detect the German language module again like it used to (especially important for silent first time installs of Pegasus Mail).
Various kinds of incomplete Urls are now properly completed and handled accordingly.
The reformat and word-wrap reader options make a difference now with respect to breaking long strings (like Urls, e.g.).
There's a new option on IER's button menu for disabling the auto-update-check on program launch. And Pegasus Mail's status bar will display the results of checking if enabled. Otherwise the Update item will be re-enabled for checking manually.
If starting a message from IER's About... dialog the status report does now include whether BearHtml and graphics download are enabled by default.
Horizontal scroll wheel support has been implemented.The biggest issue was image handling: I certainly can't get it right since today's point is responsiveness ( ), in short: One design fits all devices. While web designers in former times were supposed to provide fixed sizes for fast rendering they are now supposed to keep it as flexible as possible, so if IER doesn't download graphics on purpose or due to errors they are substituted by some visual indicator of arbitrary size which will either be modified itself or modify the design no matter what - as it is supposed to. Anyway, I'm sure you'll notice yourself and propably like it or not ;-).
And there's just one thing left which didn't fit in my time schedule: I couldn't look deep enough into the various TER editor issues reported by several people, so be prepared for further updates to come!