From the online documentation @ http://msdn.microsoft.com/library/default.asp?url=/library/en-us/spptsdk/html/tsovOMGdlnsShowASPErrors_SV01108995.asp?frame=true:

Displaying ASP.NET Error Messages

You can disable Microsoft Windows SharePoint Services error messaging so that ASP.NET error messages are displayed instead.

To display ASP.NET error messages, perform the following steps:

• In the Local_Drive:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\60\TEMPLATE\LAYOUTS folder, change the name of the global.asax file to global.bak.
• In the web.config file in the same folder, change customErrors = "On" to customErrors="Off".

That is the stupid thing when you are working with SharePoint for so long: you forget to reread the documentation for new additions!

The PDC is almost finished, and finally we get the first bits of information on the next version of SharePoint: SharePoint v3. I’m wondering if they actually have a code name for it!

This is a list of resources I found up to now, it’s more for myself to keep track of it..

First of all the downloadable PowerPoint presentations of the sessions at PDC2005: http://commnet1.microsoftpdc.com/content/downloads.aspx. Many interesting SharePoint sessions in there!

Eli Robillard visited the PDC and has some nice weblog entries at: http://weblogs.asp.net/erobillard/. Have a look at:

• The Business Catalog (http://weblogs.asp.net/erobillard/archive/2005/09/15/425364.aspx). Based on presentation: OFF321 Surfacing Your Application's Line-of-Business Data and Actions within Enterprise Portals (http://216.55.183.63/pdc2005/slides/OFF321_Burke.ppt)
• SharePoint v3 Collaboration and Tracking Features (http://weblogs.asp.net/erobillard/archive/2005/09/14/425235.aspx).

Also Bil Simser was at the PDC and has great entries at his weblog: http://weblogs.asp.net/bsimser.

Check out entries:

• PDC Day 00 (yawn, it's been a long day) (http://weblogs.asp.net/bsimser/archive/2005/09/12/424981.aspx), with info on open source tools for the current version of SharePoint.
• PDC Day 02 (Here comes the fire hose) (http://weblogs.asp.net/bsimser/archive/2005/09/14/425239.aspx), with a lot of information on the new internals, and new programming an configuration features.

Angus Logan was also at the PDC, and has some short statements on the new version of SharePoint at: http://msmvps.com/anguslogan/. Most important ones:

• SharePoint vNext has security trimming (ie. context based display)
• SharePoint vNext will ship with XSD's
• SharePoint vNext has a built in scheduler
• SharePoint v3 to support ASP.NET 2.0 Web Parts

Dustin miller is another great name in the SharePoint world who also has a great blog at: http://www.sharepointblogs.com/dustin/. Have a look at hier entry SharePoint "V3.0" Features (http://www.sharepointblogs.com/dustin/archive/2005/09/14/3503.aspx) for a great overview!

Patrick Tisseghem was also at the PDC, see his weblog at: http://blog.u2u.info/DottextWeb/patrick/ for some nice info on SharePoint vNext.

Also Mike Fitzmaurice has some info, see his weblog at: http://blogs.msdn.com/mikefitz/.

Also check out Mart Muller’s weblog at: http://blogs.tamtam.nl/mart/default.aspx.

PJ Hough, Group Program Manager for Windows SharePoint Services also started a blog: keep an eye on: http://blogs.msdn.com/pjhough/

On Channel 9 a video on SharePoint vNext is available. Have a look at: http://channel9.msdn.com/showpost.aspx?postid=115383. Also http://channel9.msdn.com/Showpost.aspx?postid=115364 on the new workflow engine is interesting.

UPDATE 2005–9–27:

Some other great posts:

http://jopx.blogspot.com/2005/09/enhancements-in-sharepoint-v3.html