Outlook lag w/ signature problem

In our offices, we have a central file/print server that is fairly new, with lots of ram, that has the PST files of all our staff located on it.  Our staff have fairly new computers as well.  We have been experiencing lag after I created an image signature on each staff's machine.  I have a lot of experience with signatures and so made the image small-ish (about 12kb) and uploaded it to our company web server (MediaTemple DV).  I am wondering if the lag problem is strictly due to the web server, or could it be a combination of that with the fact that the pst file is also remote? I hope this makes sense.
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Let me guess, you are running Windows 7?

if so, check to see if you have a default gateway of by running ipconfig in command prompt

if so, you have a bug caused by Bonjour service. you can either disable bonjour from msconfig in the services tab or run this every time you reboot in command prompt.

route delete
ipconfig /renew
jameshuckaboneAuthor Commented:
I'm wondering if it has anything to do with the image caching that I manually set that would apply to the images in question:

ExpiresActive On
ExpiresByType image/jpeg "access plus 1 month"
ExpiresByType image/jpg "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
ExpiresByType image/gif "access plus 1 month"
jameshuckaboneAuthor Commented:
I'm pretty sure most of the staff are running either Windows XP or Vista(a couple).  I'm running Windows & and have never had a problem with my local PST file and a signature pulling from the same server.
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jameshuckaboneAuthor Commented:
*Windows 7
JohnBusiness Consultant (Owner)Commented:
>>>> have never had a problem with my local PST file.

Microsoft does not support keeping PST files on a server and it leads to problems (PST corruption is one such significant problem).

I strongly suggest you keep the PST files local to the client machine and then find a way to back up the PST files when Outlook is closed.

... Thinkpads_User
Do you not have enough space on the Exchange server to house the emails?
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