[imp] IE8 and DIMP

[Alex May]

I read about some problems in the past with IE8 and DIMP. The solution seemed to be to set IE8 into compapability view. I seem to be 
having the same problem, but that is not solving it.
The problem I have is that IMP is not loading the mail list in dynamic view in IE8. It works in traditional view in either browser, 
but dynamic view only works in Firefox.
The first couple of errors that I see in the log seem to be about spam filtering. The others are about the menu. I'm not sure 
whether any of that is relevant and I certainly can't see what could be causing the errors.
Can anyone suggest a solution?
Thanks

The following is the error log:
2011-11-26T22:39:35+00:00 NOTICE: HORDE [ingo] PHP ERROR: Undefined index:  head
er [pid 15552 on line 124 of "/srv/www/htdocs/horde/ingo/lib/Script.php"]
2011-11-26T22:39:35+00:00 NOTICE: HORDE [ingo] PHP ERROR: Undefined index:  char
 [pid 15552 on line 127 of "/srv/www/htdocs/horde/ingo/lib/Script.php"]
2011-11-26T22:39:36+00:00 WARN: HORDE [imp] PHP ERROR: asort() expects parameter
 1 to be array, null given [pid 15552 on line 38 of "/srv/www/htdocs/horde/imp/l
ib/Menu/Dimp.php"]
2011-11-26T22:39:36+00:00 WARN: HORDE [imp] PHP ERROR: array_keys(): The first a
rgument should be an array [pid 15552 on line 41 of "/srv/www/htdocs/horde/imp/l
ib/Menu/Dimp.php"]
2011-11-26T22:39:36+00:00 WARN: HORDE [imp] PHP ERROR: Invalid argument supplied
 for foreach() [pid 15552 on line 41 of "/srv/www/htdocs/horde/imp/lib/Menu/Dimp
.php"]