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I’ve been working a lot with DVWP in recent weeks and have had a few issues which I’ve fixed or how to work around.

Web Connections.  Often if there are multiple web part connections on  a page you may suddenly get an error when opening a page.

Such as:

Could not find the connection provider Web Part with ID “g_2f2eb8c3_d516_439f_8e67_ffa57b95212e”.

To avoid this…Or work round it, work on the page without the connections, make a copy of the page, then add in the connections.  If further design requirements are needed, work on the page without connections and repeat the process of adding in the connections.

Unable to display this Web Part” on Data Views after restoring site from backup – SharePoint Designer Support Team Blog – Site Home – MSDN Blogs

This is a MS work around

Categorizing a column with the date value.

Need  to have the Edit formula something like:  string(ddwrt:FormatDate(string(@Review_x0020_Date),1033,1)) 

To avoid the date looking like:  12/12/2010-TXX23-433-12-12-10

This also works ddwrt:FormatDate(string(@EventDate) ,2057 ,3)

Dealing with UK dates.  Click here

ddwrt:FormatDate(string(@EventDate) ,2057 ,3)

Use JavaScript to enable formatting of Data View UI controls

Modify the lengths of List Form Fields

Hiding fields