Network Connectivity Problems (Thunderbird, Firefox, Pidgin)
I am a long time user of portableapps software, and this problem has boggled me for quite a while. Around December 2014, I started noticing network connectivity issues (not always consistent) with many of my portable apps:
Firefox - pages don't load sometimes. i get Content Encoding Error and Secure Connection Failed errors frequently.
Thunderbird - I use POP email for a few email addresses. Sometimes, when checking email, it shows that there are 1 out of x emails, but it only download a couple at a time. I have to re-send/receive to get all of them downloaded.