Maria,
There was a problem with .nsf's in a folder... I thought is was just XPiNC... I don't remember seeing it on the server but I never ran Linux. Maybe it's on Linux because of all the case sensitivity of the operating system. I remember talking to someone on the XPages dev team when I found this out. I did think this was resolved before 8.5.3 but 8.5.3 is so old now I don't remember really.
Regarding the other comments in your post. I can't believe there are people still on 8.5.3 for XPages work. I can live with an Administrator forbidding putting databases in the rood but I can't live with an Admin refusing to upgrade a server. 8.5.3 came out in 2011 I believe. That's kinda like really old. Heck I think 9.0 came out in 2013...
In today's world of security exploits.. (See Sony) and Web incompatibilities (see iOS 8 and XPages Mobile Controls) to run production apps on a 4 year old server is just insane. I know it's not your call. But I just can't understand why a company, or worse, just an administrator would not keep more current. It's not like the domino server is a difficult thing to upgrade. Yes - apps need to be tested first. But there's all sorts of fixes and security updates in there. To say nothing of the additional benefits to the developer in creating applications. So you're on 8.5.3... If you don't at least have the upgrade pack then you're missing out on a TON of xpages controls... if you do have the upgrade pack then The Mobile controls piece is dead to you most likely... It's likely incompatible with the latest iOS stuff because of the older dojo...
How does the old software benefit the business? It doesn't. It creates more cost and much more risk.
Just my thoughts...
Dave