I have applied the February Cumulative Updates to a medium size SharePoint 2007 Farm and everything from the Configuration Wizard through to the install log showed the updates as successful. Initial testing also showed it was fine but the following working day we have found a problem in Document Libriaries and Lists. Basically you can not add or update the columns in a Document Library or List and it returns the error: Culture ID 1164 (0x048C) is not a supported culture.
Nothing else appears to be affected and this does not affect every Web application as MySites are fine yet TeamSites are affected. Turning on full logging brings the following information:
04/13/2010 08:19:10.84 w3wp.exe (0x2794) 0x17B4 Windows SharePoint Services General 8nca Verbose Application error when access /_layouts/FldEdit.aspx, Error=Culture ID 1164 (0x048C) is not a supported culture. Parameter name: culture at System.Globalization.CultureTableRecord.GetCultureTableRecord(Int32 cultureId, Boolean useUserOverride) a
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