Hm, never noticed. For downloading am used to Link-Save-As. Or if left-clicking on a file link? No, just tested again, no blank page. When does it happen?
And slightly belated, but can't resist:
I was painstakingly going through the Preferences list to make sure both versions (1.6.0 Beta 2 and 1.6.0 Beta 2.6) were configured the same.
The pref list is in the profile folder, called "prefs.js". Copying that file over from old profile to new profile folder can save some work
The other stuff in the profiles folder can be copied too as long as the KM versions are not too far apart. 1.5/1.6 are very similar profilewise, but guess newer ones are too different (1.7, 1.8, 74...)
In the process I changed something in the "Finding Websites" URL bar tab: I took the checkmark out of the "Find fitting pages in global history as you type" box (since I never type if I can help it!). Which also grayed-out the option, "Autocomplete as you type." I suspect that the autocompletion function may have been what was blocking me from pasting the URL's as I wished to. At any rate, I can now paste to my heart's content and am no longer seeing that blasted "about:blank" each time I do so.
Would prefer to keep those handy options enabled. Not quite sure, and history plugin does tend to have bugs in beta versions, but I don't think that was the culprit. Rather what rodocop suggested, either some vcredist prob, or perhaps a bug with the older gecko engine in 1.6beta2. James version has a newer engine and therefore quite some bugs less. Guess it's the closest to the official KM versions, other user versions are rather forks with additional gimmicks, which of course can be very useful too.
With older beta versions (or was it 1.7alpha?) I had that pasting bug too, and worked around it by saving text to a txt-file, then opening that file with the browser. Highlighting an adress and hitting the go-button, or highlighting some text and hitting search button. But guess that bug is fixed now.
...every time I try to paste something into the Open URL box or Google's search bar.
Did you know, the search bar is rather unnecessary, as is the open-url-box. It's mostly there for people who are unfamiliar with KM yet. In KM you can highlight some text on a page that you want to google for and search for it by simply clicking the search button
Or you can type into the URL bar using it simultaneously as search bar. If the pref "keyword autosearch" is checked in F2>FindingWebsites>URLBar (at the bottom) it works this way: if the typed text in the URL bar contains a blank, e.g. because someone is searching for several words, KM will automatically send it to the preferred search engine, also if a single word is set between " ". Otherwise it's considered a website URL.