With Sybase, when you insert an empty string in a field and retrieve it, you get back an empty string. With most other rdbms, you get back a null. This affects CWebProxy channel parameters cw_xslTitle and cw_xsl, which along with cw_ssl, are used to derive the URI of the stylesheet used in the transform. When the value of cw_xslTitle is an empty String as opposed to a null, the attempt to locate the CWebProxy stylesheet list fails with an NPE even if cw_xsl has a valid value...and the channel fails to render.

Fix: In addition to checking for cw_xslTitle==null before it sets this value on ChannelState, CWebProxy.setStaticData() should also check for cw_xsl and cw_xslTitle equals() an empty String, as it does for a number of other params. See: CWebProxy.setStaticData() line 446.

This may only show up with Sybase.