Here are some additional details on the XPages fixes, 9 in all, you can expect in the Notes Domino 8.5 Fix Pack 1 fix list. You will see here that XPages will have a section all to itself. And all of these fixes have also made it into 851.
Most of the bugs were to do with view panels, with 'EGLN7NSDB7', 'MDOY7NYDNA', 'MDOY7NYW3N' and 'MDOY7MFVUY' all resolve issues one way or the other with categorized columns.
A fix through 'JGRT7PFTGG' allows you to use Java resources that come from a third party jars file, and so helping you extended any existing business logic in Notes applications.
A dash or a missing dash can cause you problems. Using the metaData control in 85 to specify a httpEquiv value generated the wrong HTML. This missing dash has been fixed through 'PRID7NBUJ3' so that the correct html is generated at runtime oin the browser -.
Controls added to the header and footer of a data table now display, fixed with 'PHAN7NXSAM'. And you shouldn't no longer see a problem with partial refresh on the Safari browser, this is fixed through 'PHAN7MLBSG'.
And finally, and my favourite, that Tabbed Panel bug 'PHAN7NXGLG'. You now don't have to use the worst workaround in the world where you had to 'review' each tab in order to submit all the data on the tabbed panel. This fix will come as a welcome relief to many including myself as you should now be able to use this container control to its full potential.
Here is the list as posted in the release notes for Fix Pack 1...
All the above fixes are in 8.5.1 (to be released in Q3 2009) along with quite a few more than the 9 listed in FP1. Needless to say I won't be writing up a report on all of these 851 fixes ;-)
Excellent news about the tabbed panel bug. It's particularly annoying and was equally annoying when I used tabbed panels in dojo (before XPages).