I'm resolving this ticket, and I've reopened the relevant MIMP ticket.

I believe that Graeme is correct, and this was to allow editing of 
MIMP prefs from the web interface.



I've un-merged the change for now, but have left it in HEAD; we should 
revert it in HEAD also as soon as we can find a better way to handle 
the case of MIMP, and other similar apps (for instance, do I really 
need to log into IMP to edit my prefs? Aside from the case of folders, 
no, but we can't break BC now, so...)

Look like Chuck made this change - maybe he remembers the need for it. 
  The log message is vague on the overlying purpose.

That does seem to be the source of the problem.



If I understand it correctly, that change was put in to allow you to 
change MIMP preferences without having to login again to MIMP.

No - since he is not using IMP 4.0.4-cvs - which is where my stream 
initialization change was made.  Something in Horde itself changed 
between 3.0.4 and 3.0.5 that required us to add the line to IMP's 
preference code.



My best guess is this change broke BC:

http://cvs.horde.org/diff.php/horde/services/prefs.php?r1=1.19.2.2&r2=1.19.2.3&ty=h

Michael, has this anything to do with the stream initialization that 
you moved to lib/prefs.php? Maybe this was only necessary due to a 
change in Horde, and worked fine with older Horde versions?

I've been playing with Horde-3.0.5-RC2 using IMP-4.0.3 and PHP 4.4.0. 
I am seeing a problem whenever I update Options in IMP. The issue 
affects any preference module that accesses imp/lib/Folder.php. It 
would appear that the session variables that hold things like 
base_protocol, hierarchies, folders and stream are not being set.   
This only affects IMP when running under Horde-3.0.5-RC2. IMP is fine 
if running under Horde-3.0.4. Here are some sample error messages:



[Sun Jul 17 08:31:41 2005] [error] PHP Warning:  imap_lsub(): supplied 
argument

is not a valid imap resource in 
/usr/local/www/public_docs/horde/imp/lib/Folder.

php on line 135

[Sun Jul 17 08:31:41 2005] [error] PHP Notice:  Undefined index:   
base_protocol

in /usr/local/www/public_docs/horde/imp/lib/Folder.php on line 171

[Sun Jul 17 08:31:41 2005] [error] PHP Notice:  Undefined index:   
stream in /usr

/local/www/public_docs/horde/imp/lib/Folder.php on line 268

[Sun Jul 17 08:31:41 2005] [error] PHP Notice:  Undefined index:   
folders in /us

r/local/www/public_docs/horde/imp/lib/Folder.php on line 268

[Sun Jul 17 08:31:41 2005] [error] PHP Notice:  Undefined index:   
hierarchies in

  /usr/local/www/public_docs/horde/imp/lib/Folder.php on line 268

[Sun Jul 17 08:31:41 2005] [error] PHP Notice:  Undefined index:   
dotfiles in /u

sr/local/www/public_docs/horde/imp/lib/Folder.php on line 268

[Sun Jul 17 08:31:41 2005] [error] PHP Notice:  Undefined index:   
namespace in /

usr/local/www/public_docs/horde/imp/lib/Folder.php on line 268



I suspect the problem is more widespread than just an interaction with 
IMP though.