Exact same problem here, I have 2 servers on one a meanwhile 4 gig wiki is working flawlessly, on the other one, constant problems. One i have firwalled myself one is firewalled by the department, I am researching if its about some ports that need to be opened in addition.
The problem presents itself in 2 ways:
1* uploading of files ( 50kbyte e.g ) just timed out.
2* Saving a page hangs on checking page status
The workarounds so far:
1* delete and reup a file on some other page in the wiki, every time the other upload that stalled will work again
2* In most cases deleting the table helps, in almost all cases there is a table in pages that hang.Going back in revison, if you can definitly helps.
Here is a log on a page that keeps hanging, everything seems ok
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Started POST "/wiki/api" for 127.0.0.1 at Wed Sep 14 10:00:46 +0200 2011
Processing by ApiController#call as JSON
Parameters: {"{\"authRef\": \"5CF1D6BE-ECEB-4446-9238-FA86E7DD0E5E\", \"serviceName\": \"ContentService\", \"methodName\": \"checkACL:againstEntityTinyID:asUserExternalID:\", \"arguments\": "=>{"\"write\", \"eventsveranstaltungen\", \"02D5AA46-5E5A-491A-8BBC-C20EA23D405A\""=>{"}"=>nil}}}
req JSON:
{"authRef"=>"5CF1D6BE-ECEB-4446-9238-FA86E7DD0E5E", "methodName"=>"checkACL:againstEntityTinyID:asUserExternalID:", "arguments"=>["write", "eventsveranstaltungen", "02D5AA46-5E5A-491A-8BBC-C20EA23D405A"], "serviceName"=>"ContentService"}
JSON Response:
true
Completed 200 OK in 53ms (Views: 0.3ms)
Started GET "/wiki/entities/38e1dc95-e65d-426a-a8e6-0f1f63ce3a7b/latest_revision" for 129.27.7.48 at Wed Sep 14 10:00:51 +0200 2011
Processing by EntitiesController#latest_revision as JS
Parameters: {"id"=>"38e1dc95-e65d-426a-a8e6-0f1f63ce3a7b"}
Rendered text template (0.0ms)
Completed 200 OK in 139ms (Views: 0.8ms)
Started GET "/wiki/entities/56ae3fff-08db-4aa3-aaba-c02d579bb416/latest_revision" for 129.27.7.48 at Wed Sep 14 10:00:53 +0200 2011
Processing by EntitiesController#latest_revision as JS
Parameters: {"id"=>"56ae3fff-08db-4aa3-aaba-c02d579bb416"}
Rendered text template (0.0ms)
Completed 200 OK in 59ms (Views: 0.8ms)
-------------------------------------------------------------------------------- ----------------------------------------
Upon further inquiry I checked history, and voila the page as it should be was shown correctly with the changes in the revision on #1, of course you cant revert to that, in the wikis state, this IS/should be the current page, but it is not the changes are not shown when you navigate there, only in the revision history as no1 everything looks as it should, going back one revision, then redoing the changes worked flawlessly. I think it should be clear that something goes wrong saving the page (maybe connection wise) the logs really dont help though.
So maybe some ports need to be open besides 443 ?