In the previous version of Daniweb there was 1 error and no warnings reported by the web developer toolbar in Firfox 3.5.9 under Linux.
But the current version has a few more (a lot more actually). For instance, when opening PHP forum with the same browser you get the following list of warnings and errors:
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: http://www.daniweb.com/rxrimages/danicss.css
Line: 32
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: http://www.daniweb.com/rxrimages/danicss.css
Line: 122
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: http://www.daniweb.com/rxrimages/danicss.css
Line: 1036
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: http://www.daniweb.com/rxrimages/danicss.css
Line: 1654
Warning: Error in parsing value for 'white-space'. Declaration dropped.
Source File: http://www.daniweb.com/rxrimages/danicss.css
Line: 1807
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 18
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 76
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 77
Warning: Unknown property 'border-top-left-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 274
Warning: Unknown property 'border-top-right-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 275
Warning: Unknown property 'border-bottom-left-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 276
Warning: Unknown property 'border-bottom-right-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 277
Warning: Unknown property 'border-top-left-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 278
Warning: Unknown property 'border-top-right-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 278
Warning: Unknown property 'border-bottom-left-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 279
Warning: Unknown property 'border-bottom-right-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 279
Warning: Unknown property 'border-top-right-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 280
Warning: Unknown property 'border-bottom-right-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 280
Warning: Unknown property 'border-top-left-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 281
Warning: Unknown property 'border-bottom-left-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 281
Warning: Unknown property 'border-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 282
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 285
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 286
Warning: Unknown property 'border-radius'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 286
Warning: Unknown property 'zoom'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 294
Warning: Unknown property 'zoom'. Declaration dropped.
Source File: http://www.daniweb.com/forums/clientscript/jquery/css/smoothness/jquery-ui-1.8.custom.css
Line: 301
Error: _gat is not defined
Source File: http://www.daniweb.com/forums/forum17.html
Line: 234
I not only liked the old version much more than the current one, but it seems the css was better written as well. For a website aimed at the IT-world, it doesn't look very professional when there are so many css errors.