Oh and I've just turned on the debug which shows as follows:

PHP Code:
Google Merchant Center Feeder v1.9.1 started 2011/05/24 08:15:30
Feed file - /shop/feed/google/L_products.xml
Processing: Feed - Yes, Upload - No
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id: 302, price: 95, description length: 42 - including - success
id: 303, price: 95, description length: 42 - including - success
id: 304, price: 95, description length: 42 - including - success
id: 305, price: 95, description length: 42 - including - success
id: 306, price: 128, description length: 37 - including - success
id: 307, price: 128, description length: 37 - including - success
id: 308, price: 32, description length: 119 - including - success
id: 309, price: 32, description length: 120 - including - success
id: 310, price: 32, description length: 111 - including - success
id: 311, price: 128, description length: 37 - including - success
id: 312, price: 86.4, description length: 37 - including - success
id: 313, price: 86.4, description length: 37 - including - success
id: 314, price: 86.4, description length: 37 - including - success
id: 315, price: 86.4, description length: 37 - including - success
id: 316, price: 86.4, description length: 37 - including - success
id: 317, price: 86.4, description length: 37 - including - success
id: 318, price: 86.4, description length: 37 - including - success
id: 319, price: 86.4, description length: 37 - including - success
id: 320, price: 86.4, description length: 37 - including - success
id: 321, price: 86.4, description length: 37 - including - success
id: 322, price: 86.4, description length: 37 - including - success
id: 323, price: 86.4, description length: 37 - including - success
id: 324, price: 86.4, description length: 37 - including - success
id: 325, price: 86.4, description length: 37 - including - success
id: 326, price: 86.4, description length: 37 - including - success
~id: 327, price: 86.4, description length: 37 - including - success
id: 328, price: 86.4, description length: 37 - including - success
id: 329, price: 86.4, description length: 37 - including - success
id: 330, price: 86.4, description length: 37 - including - success
id: 331, price: 86.4, description length: 37 - including - success
id: 332, price: 214.65, description length: 301 - including - success

Google Merchant Center File Complete In 1.956171 Seconds 306 of 306 Records 
config as follows:

PHP Code:
Expiration Date Adjust     31 
Expiration Date Base     now 
Enable Map Pricing     false
Description 2     false 
UPC/ISBN     false
Show Default Currency     true 
Default Currency     GBP 
Show Offer ID     id 
Show Quantity     false
Include Zero Quantity     true 
Default Quantity     0
Shipping Options     Flate Rate UPS £10.50
Condition     new
Show Feed Language     false 
Feed Language     English
Magic SEO URLs     false
Output File Name     L
Use cPath in url     false      
Output Directory     feed/google/
Compress Feed File     false 
Display Tax     true      
Uploaded date          
Tax Rate     20      
Tax on Shipping     y 
Tax Region          
Tax Country     UK      
Starting Point     0      
Max products     0      
Pickup     do not display      
Excluded Categories      
Included Categories      
Excluded Manufacturers      
Included Manufacturers     
Show Weight     false
Weight Units     pounds 
Product Type     top
Payments Accepted     Cash,Check,Visa,MasterCard
Payment Notes
Alternate Image URL
Image Handler     false 
Use Meta Title     false
Select Shipping Method     flat rate
Table Zone ID         
Shipping Country     222
Shipping Region     
Shipping Service     UPS 
Not sure if any of the above would help?