If you customised a list in SharePoint Designer with text fields using Append Changes to Existing Text, their history stopped appearing.
Web Part Connection – connecting a DataView and a Web Part
Connecting a DataView and Web Part for one list through Web Part Connection is useful, for example, with an employee list.
Decimal number display error in custom lists!
I encountered a decimal number display error while creating a new DispForm.aspx in SharePoint Designer: numbers stored with a decimal comma were not displayed. The Discount field was meant to display a percentage, so entering 10% automatically converted it to 0,1. The problem is the Czech language environment (Czech language pack), which stores the value with a comma (0,1) rather than a decimal point (0.1), then cannot read it back. This occurred on SharePoint Services 3 SP2 with all current updates, so another workaround was needed.
Sending an email notification from a workflow with a link back to the item
How to send an email notification from a workflow containing an HTML link to the item on which the workflow was started.