SharePoint 2007 to 2010 upgrade workflow task content type id issue

When upgrading from SharePoint 2007 to 2010 I came across a rather odd issue. A custom workflow was no longer using the custom WrkTaskIP.aspx page to host the InfoPath forms as it did in 2007. On closer inspection this was caused by the tasks created from the workflow not having the right content type (and the custom WrkTaskIP page was referenced in the workflow task content type xml file).

jQuery to override SharePoint OOTB Upload.aspx default for "Add as a new version to existing files" checkbox

A common query from SharePoint users with versioning enabled on document libraries is to default the "Add as a new version to existing files" checkbox on the OOTB upload.aspx page to unchecked. If you google how to uncheck it by default you'll get lots of entries showing you how to simply edit the Upload.aspx file in the \TEMPLATE\LAYOUTS\ folder in the 12/14 hive. This works fine of course if you don't care about tomorrow and having a supported/upgradeable SharePoint installation.

SharePoint 2007 performance issue caused by too many event receivers

If you have a huge number of webs in a SharePoint 2007 site collection with a large number of content types you might have come across some of the more esoteric performance limitations of SharePoint. Regardless of whether you've followed the best practice guidelines for number of sites, lists, list items etc you could fall foul of some rather dodgy SQL in the SharePoint content database.