Not a new one, but today it was useful fixing a customer issue with opening URLs in external browser.
I didn’t knew this parameter, learned it from a teammate…
In the Notes client preferences, „use operating system browser“ was selected, but users couldn’t open any URL. Embedded URLs and even bookmarks did not open the browser. It simply happened nothing, no error message.
Just used notes.exe -rparams -resetconfig parameter to reset the workspace configuration and the problem was solved.
But be careful, I found also some examples of negative impact using this parameter like this one: http://www.ruddigkeit.net/?p=527
More details can be found in the Lotus Notes and Domino wiki.