I'm still seeing CORS errors when running queries on /bumblebee/ux-class/ for brand new queries. Here is what I was able to dig up for an unfielded query of "accomazzi":
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://api.adslabs.org/v1/search?fl=id&q=accomazzi&_=1412553356753. This can be fixed by moving the resource to the same domain or enabling CORS. search
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://api.adslabs.org/v1/search?fl=title%2Cabstract%2Cbibcode%2Cauthor%2Ckeyword%2Cid%2Ccitation_count%2Cpub%2Caff%2Cemail%2Cvolume%2Cyear%2Clinks_data%2Cids_data%2C%5Bcitations%5D%2Cproperty&hl=true&hl.fl=title%2Cabstract%2Cbody&q=accomazzi&rows=25&_=1412553356754. This can be fixed by moving the resource to the same domain or enabling CORS. search
96.230.84.139 - - [05/Oct/2014:19:56:05 -0400] "GET /v1/search?fl=id&q=accomazzi&_=1412553356753 HTTP/1.1" 500 291 "http://adslabs.org/bumblebee/ux-class/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:32.0) Gecko/20100101 Firefox/32.0" "-" "-"
96.230.84.139 - - [05/Oct/2014:19:56:05 -0400] "GET /v1/search?fl=title%2Cabstract%2Cbibcode%2Cauthor%2Ckeyword%2Cid%2Ccitation_count%2Cpub%2Caff%2Cemail%2Cvolume%2Cyear%2Clinks_data%2Cids_data%2C%5Bcitations%5D%2Cproperty&hl=true&hl.fl=title%2Cabstract%2Cbody&q=accomazzi&rows=25&_=1412553356754 HTTP/1.1" 500 291 "http://adslabs.org/bumblebee/ux-class/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:32.0) Gecko/20100101 Firefox/32.0" "-" "-"
--969f0178-A--
[05/Oct/2014:19:56:05 --0400] tZmRjYOOuSYAAGakO@QAAAAr 96.230.84.139 56152 131.142.185.10 80
--969f0178-B--
GET /v1/search?fl=id&q=accomazzi&_=1412553356753 HTTP/1.1
Host: api.adslabs.org
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:32.0) Gecko/20100101 Firefox/32.0
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
X-BB-Api-Client-Version: 20140329
Authorization: Bearer:LBLMhQx2XGbikXGLDFbrDEcInpTKPfeEvP2RiYlkzFogU69X1hu9vO1fGw17
Referer: http://adslabs.org/bumblebee/ux-class/
Origin: http://adslabs.org
X-Forwarded-For: 131.142.185.25
Connection: keep-alive
--969f0178-F--
HTTP/1.1 500 INTERNAL SERVER ERROR
Content-Type: text/html; charset=UTF-8
Content-Length: 291
Connection: close
--969f0178-E--
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<title>500 Internal Server Error</title>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.</p>
--969f0178-H--
Apache-Handler: proxy-server
Stopwatch: 1412553365885325 17787 (- - -)
Stopwatch2: 1412553365885325 17787; combined=308, p1=297, p2=8, p3=0, p4=0, p5=3, sr=33, sw=0, l=0, gc=0
Response-Body-Transformed: Dechunked
Producer: ModSecurity for Apache/2.7.1 (http://www.modsecurity.org/); OWASP_CRS/2.2.9.
Server: Apache/2.2.3 (CentOS)
Engine-Mode: "ENABLED"
--969f0178-Z--
--969f0178-A--
[05/Oct/2014:19:56:05 --0400] tZmUuYOOuSYAAGpgWTsAAAA3 96.230.84.139 56151 131.142.185.10 80
--969f0178-B--
GET /v1/search?fl=title%2Cabstract%2Cbibcode%2Cauthor%2Ckeyword%2Cid%2Ccitation_count%2Cpub%2Caff%2Cemail%2Cvolume%2Cyear%2Clinks_data%2Cids_data%2C%5Bcitations%5D%2Cproperty&hl=true&hl.fl=title%2Cabstract%2Cbody&q=accomazzi&rows=25&_=1412553356754 HTTP/1.1
Host: api.adslabs.org
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:32.0) Gecko/20100101 Firefox/32.0
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
X-BB-Api-Client-Version: 20140329
Authorization: Bearer:LBLMhQx2XGbikXGLDFbrDEcInpTKPfeEvP2RiYlkzFogU69X1hu9vO1fGw17
Referer: http://adslabs.org/bumblebee/ux-class/
Origin: http://adslabs.org
X-Forwarded-For: 131.142.185.25
Connection: keep-alive
--969f0178-F--
HTTP/1.1 500 INTERNAL SERVER ERROR
Content-Type: text/html; charset=UTF-8
Content-Length: 291
Connection: close
--969f0178-E--
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<title>500 Internal Server Error</title>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.</p>
--969f0178-H--
Apache-Handler: proxy-server
Stopwatch: 1412553365886137 17803 (- - -)
Stopwatch2: 1412553365886137 17803; combined=311, p1=299, p2=8, p3=1, p4=0, p5=3, sr=33, sw=0, l=0, gc=0
Response-Body-Transformed: Dechunked
Producer: ModSecurity for Apache/2.7.1 (http://www.modsecurity.org/); OWASP_CRS/2.2.9.
Server: Apache/2.2.3 (CentOS)
Engine-Mode: "ENABLED"
--969f0178-Z--
So it looks to me like the culprit is not CORS but rather internal server errors on the application side. I don't know enough about the docker setup to investigate what goes on there, but maybe @vsudilov can check the nginx logs and see what happened to those two requests?