in the last 48 hours we had 15 orders, 5 of these orders looked like this
Click image for larger version.  Name: ScreenCapture_01 Apr. 03 16.34.jpg  Views: 202  Size: 20.4 KB  ID: 12290

Sub-Total: $135.50
ozpost_PPSE5: $0.00
GST: $12.32
Total: $135.50


Sub-Total: $151.80
ozpost_REG: $0.00
GST: $13.80
Total: $151.80

Sub-Total: $12.20
ozpost_EXLS: $0.00
GST: $1.11
Total: $12.20



the rest of the orders are fine (come up with ozpost postage options)
seems to be an intermittent problem, half the orders are fine at random times
nothing in-particular different about the orders
customers said it removed the postage options at paypal page
problem only in the last 48 hours

about 48 hours ago i updated the "Restrain Dimensions." to yes



after the problem was reported a few hours ago i updated oz-post to new version
and no new errors yet

Also I checked the cache, it was too big so blocked me from access (i don't have cpanel file management or anything, just ftp), so i rebuilt the cache (renamed and recreated) and waited for errors, just got allot of errors saying the database cache location was incorrect, so i fixed that and only errors since:

Code:
[03-Apr-2013 15:37:48] PHP Fatal error:  1062:Duplicate entry 'cede06403704e30b3a3afd6c61ca37f1' for key 'PRIMARY' :: 


insert into sessions
              values ('cedex6400xxxxxxc61ca37f1', '1364xxxxx8', 
'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') in 
/home/xxxxxx/xxxxx/includes/classes/db/mysql/query_factory.php on line 101
Code:
[03-Apr-2013 16:35:28] PHP Warning:  file(/home/xxxxx/xxxxx/cache/clickNsendInt.csv) [<a href='function.file'>function.file</a>]: failed to open stream: No such file or directory in /home/xxxxx/xxxxx/includes/modules/shipping/ozpost.php on line 1495
i am going to ignore these errors.
Site seems to be working fine, and i can not reproduce the problem, but it's intermittent so don't know if its going to happen again.