SOFTWARE VERSION:
10.2010.19-1
(was also present prior to upgrade to PR1.2)

EXACT STEPS LEADING TO PROBLEM: 
1. Incoming call from contact Joe (from CELL).
2. Answer call or leave it unanswered (doesn't change the result).
3. Incoming call from contact Joe (from PHONE(WORK)).
4. Answer call or leave it unanswered (doesn't change the result).
At this point, phone application shows two entries in the log.
5. Press one of the entries to reveal the specific number contact Joe used to
call to allow calling or sending SMS.

EXPECTED OUTCOME:
Each entry show relevant field/number of contact Joe.
Calling/SMSing it results in connecting to the correct destination.

ACTUAL OUTCOME:
Both entries show the same field/number of contact Joe (PHONE(WORK)).
Calling/SMSing it results in connecting to the same destination (PHONE(WORK)).

REPRODUCIBILITY:
always - for this specific contact

EXTRA SOFTWARE INSTALLED:
A long list. 
However, after re-FLASHING the device (and EMMC) with the lately released PR1.2
and restoring CONTACTS ONLY from backup, problem persisted.


OTHER COMMENTS:
1. Same happens for any number of incoming/outgoing/missed calls for this
contact.
However, the PHONE(WORK) field only overshadows the CELL field. As other
numbers from the same contact (PHONE(HOME), etc) show correctly.  

2. Interestingly PHONE app. still shows different entries for each field/number
as it shuold (not aggregating all in one entry as is done for recurring calls
from the same field/number). 

3. I can only reproduce this problem (always) for one contact.

4. Communication history (in CONTACTS app.) for this contact shows correct
numbers for each call instance.

5. Deleting contact and re-syncing with PC (Outlook) didn't help.

6. After deleting the PHONE(WORK) field manually (from the phone) and
re-entering it, the opposite effect is present - CELL now overshadows
PHONE(WORK) in the PHONE app.

7. At the time of writing this bug report, other contacts (at least 2 checked)
with both PHONE(WORK) and CELL fields don't seem to have this issue.

8. My contact list is >700 entries long. Most contacts have multiple phone
numbers and multiple IM entries. SIP accounts are also present.

9. The issue didn't always exist. However, I can't put my finger on the exect
point in time when it appeared (Sometime after the PR1.1.1 update, perhaps with
it). And a clean re-flashed phone still had the issue, so other SW installed
doesn't seem to be connected.

User-Agent:       Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64;
Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729;
Media Center PC 6.0; InfoPath.2; OfficeLiveConnector.1.5; OfficeLivePatch.1.3)