I just upgraded my Notes client from 8.5.2 to 8.5.3 and now I'm having some strange issues.
1) If I make any change to an xpage design element in an existing, working database, the next time I open the application, I get "Error 500 - Unexpected error condition". Restarting the Notes client resolves the issue, which does not occur again until I modify another design element. Compacting, fixup, making a copy of the database - all failed to fix the issue.
2) All xpage applications are extremely slow even when using the new XPagesPreload and XPagesPreloadDB INI settings. The slowness is not just on the first load - and it happens on all navigation links.
Initially, I installed 8.5.3 on top of 8.5.2. When I started having problems, I completely removed Notes from my machine (files + registry) and installed a fresh copy of 8.5.3. Still no luck.
Finally, I tried creating a new database with 1 xpage and 1 ssjs library - still having the "Error 500" issue, but seems to load fast.
Any ideas? I'm going to roll-back to 8.5.2 for now so I can move forward with my current project, but I'll setup a test client and continue looking at this issue.