I try to convert Europe OSM data to my postgis database and observe that some contries like Greece or Russia are imported incorrect. It seems that it takes only part of their geometries. For example there is only two separate islands for Greece in my database after osm2pgsql importing now. It seems strange, I tried to use different arguments and took the same result. I use the latest version osm2pgsql from SVN 0.69-23858 and osm file from Geofabrik
osm2pgsql -d osm2pgsql_greece -S ~/osm/default.style -U postgres -W -H localhost -G --slim ~/osm/greece.osm
SELECT ST_AsText(way) FROM planet_osm_polygon p WHERE p.admin_level = '2'
Result:: MULTIPOLYGON(((2656334.92 4156335.71,2656423.97 4157233.27,2656571.36 4158123.17,2656776.41 4159001.45,2657038.12 4159864.59,2657355.61 4160708.64,2657727.52 4161530.2,2658152.1 4162325.46,2658627.54 4163091.29,2659151.97 4163824.14,2659723.15 4164521.04,2660338.41 4165178.97,2660995.42 4165795.07,2661691.05 4166366.63,2662422.65 4166891.32,2662947.63 4167225.31,2663012.75 4167264.73,2663251.98 4167406.11,2664045.57 4167830.24,2664865.11 4168201.38,2665707.13 4168517.74,2666567.96 4168777.95,2667443.93 4168981.07,2668331.37 4169126.14,2669226.27 4169212.61,2670090.11 4169239.94,2670351.6 4169239.94,2670386.44 4169239.8,2671284.9 4169207.99,2672179.47 4169117.03,2673066.01 4168967.48,2673940.98 4168759.87,2674800.59 4168495.17,2675640.94 4168174.6,2676458.59 4167799.39,2676567.35 4167744.46,2676589.05 4167735.36,2677406.69 4167360.02,2678198.06 4166931.82,2678287.9 4166877.72,2678851.73 4166572.56,2679613.38 4166093.15,2679903.48 4165891.44,2680266.94 4165653.99,2680995.63 4165125.55,2681688.26 4164550.39,2682341.82 4163930.82,2682532.81 4163724.44,2682953.63 4163269.71,2683521.03 4162569.77,2683782.13 4162200.76,2684041.56 4161834.14,2684135.98 4161680.28,2684513 4161065.95,2684933.34 4160268.47,2685089.41 4159936.18,2685163.44 4159769.36,2685718.36 4159675.08,2686592.22 4159466.7,2687450.72 4159201.13,2687485.34 4159189.18,2687810.39 4159081.32,2688649.63 4158759.8,2689466.16 4158383.95,2689741.01 4158242.29,2689858.45 4158184.15,2689873.36 4158176.68,2690414.82 4157961.94,2691231.13 4157585.99,2692021.27 4157156.94,2692781.59 4156676.99,2693509.06 4156148.16,2694200.35 4155572.52,2694852.69 4154952.77,2695463.16 4154291.37,2695699.38 4154010.72,2695732 4153970.8,2696061.95 4153551.53,2696581.14 4152815.82,2697051.25 4152047.71,2697462.35 4151266.62,2697540.38 4151131.02,2697959.28 4150333.71,2698325.41 4149510.67,2698636.99 4148665.29,2698892.91 4147801.39,2699091.95 4146922.5,2699233.33 4146032.55,2699316.49 4145135.35,2699341.2 4144290.44,2699341.09 4144170.93,2699340.86 4144115.04,2699306.69 4143214.73,2699300.46 4143129.95,2699544.02 4142455.28,2699799.61 4141591.87,2699998.54 4140713.6,2700139.69 4139824.14,2700222.74 4138927.43,2700247.34 4138084.08,2700246.78 4137726.15,2700246.67 4137669.35,2700212.38 4136769.56,2700119.66 4135874.05,2699968.82 4134986.6,2699760.65 4134111.02,2699495.82 4133251.09,2699175.78 4132410.47,2698801.63 4131592.82,2698375.17 4130801.37,2697898.05 4130039.79,2697372.51 4129311.18,2697189.95 4129079.92,2697157.44 4129039.55,2696768.27 4128578.41,2696152.67 4127924.94,2695496 4127313.36,2694800.92 4126746.24,2694070.55 4126225.88,2693445.94 4125834.87,2693091.28 4125591.23,2692643.55 4125306.15,2692578.43 4125266.47,2692263.62 4125080.13,2691472.13 4124660.05,2690654.94 4124292.66,2689815.7 4123979.72,2688957.98 4123722.45,2688085.24 4123522.18,2687201.47 4123379.46,2686310.36 4123295.11,2685471.46 4123269.25,2685210.64 4123269.25,2685154.75 4123269.38,2684260.19 4123302.42,2683369.75 4123394.09,2682487.2 4123543.85,2681616.13 4123751.42,2681538.43 4123772.82,2681159.39 4123870.58,2680303.67 4124134.77,2679467 4124454.49,2678652.8 4124828.51,2677864.77 4125255.1,2677642.02 4125388.09,2677576.9 4125427.77,2677040.9 4125772.3,2676314.76 4126298.47,2676160.47 4126420.1,2675783.43 4126590.21,2675226.95 4126852.57,2674438.58 4127278.96,2674412.09 4127294.54,2673921.95 4127527.11,2673133.47 4127953.52,2672374.27 4128430.62,2672099.98 4128620.82,2671721.61 4128867.37,2670995.03 4129393.41,2670304.18 4129965.95,2670254.75 4130009.98,2669689.36 4130425.38,2668998.4 4130997.98,2668712.64 4131258.27,2668456.16 4131492.28,2668247.33 4131673.31,2667594.99 4132290.14,2666984.07 4132948.34,2666474.9 4133570.12,2665984.87 4134205.49,2665927.21 4134280.71,2665807.31 4134440.92,2665318.29 4134974.27,2665105.56 4135225.03,2665072.61 4135264.74,2664718.39 4135711.11,2664197.86 4136443.93,2663725.97 4137209.48,2663305.08 4138004.36,2662936.61 4138825.2,2662622.46 4139668.61,2662363.76 4140530.93,2662161.71 4141408.5,2662017.22 4142297.41,2661930.95 4143194.11,2661920.26 4143522.92,2661883.97 4143561.98,2661839.89 4143614.21,2661287.41 4144135.79,2660675.49 4144794.42,2660639.64 4144835.8,2660503.72 4144970.78,2659891.69 4145629.32,2659323.62 4146326.84,2658802.2 4147060.09,2658329.54 4147826.09,2657907.64 4148621.6,2657538.5 4149443.08,2657223.47 4150287.15,2657169.37 4150451.52,2657059.72 4150764.8,2656800.23 4151627.84,2656597.52 4152506.15,2656503.93 4153067.25,2656334.92 4156335.71)),((2323144.44 4475744.31,2323152.45 4476244.08,2323214.01 4477171.93,2323335.91 4478093.71,2323517.58 4479005.63,2323758.25 4479903.78,2324057.03 4480784.24,2324412.48 4481643.35,2324823.25 4482477.21,2325287.45 4483282.43,2325803.19 4484055.38,2326368.25 4484792.83,2326980.28 4485491.69,2327636.51 4486148.74,2328334.26 4486761.3,2329070.42 4487326.7,2329782.86 4487805.6,2329848.32 4487846.77,2329907.43 4487883.74,2330711.05 4488347.82,2331543.16 4488758,2332400.32 4489112.6,2332972.61 4489313.71,2333638.19 4489533.03,2334534.2 4489772.11,2335443.79 4489951.67,2336363.29 4490071.14,2337288.58 4490129.82,2338215.65 4490127.44,2339140.71 4490064.13,2340059.55 4489940.18,2340968.25 4489756,2341042.72 4489738.08,2341328.03 4489673.51,2342222.82 4489429.95,2343099.68 4489128.14,2343955.06 4488769.2,2344785.17 4488354.82,2345586.45 4487886.82,2346355.44 4487367.17,2347088.81 4486797.98,2347783.45 4486181.92,2348436.45 4485521.51,2349045.03 4484819.57,2349606.42 4484079.32,2349965.76 4483534.66,2349991.58 4483504.99,2350110.47 4483356.34,2350142.98 4483315.18,2350585.36 4482723.54,2351097.21 4481948.03,2351557.29 4481140.53,2351963.72 4480304.68,2352246.91 4479623.37,2352343.99 4479378.79,2352510.19 4478951.07,2352804.4 4478069.23,2353040.51 4477169.97,2353217.51 4476257.23,2353334.62 4475334.91,2353391.39 4474406.95,2353397.29 4473978.72,2353396.96 4473773.29,2353387.38 4473271.96,2353323.15 4472344.73,2353198.7 4471423.73,2353014.46 4470513.02,2352771.45 4469616.37,2352470.56 4468737.69,2352113.11 4467880.74,2351700.78 4467049.02,2351235.13 4466246.44,2350718.39 4465476.05,2350263.09 4464877.16,2350197.63 4464795.7,2350087.21 4464659.75,2349474.84 4463963.8,2348818.61 4463309.54,2348799.91 4463293.19,2348121.19 4462699.74,2347599.88 4462293.08,2347222.73 4462014.12,2346452.18 4461500.91,2345650.01 4461039.27,2344819.57 4460631.29,2343964.41 4460278.76,2343088.1 4459983.09,2342194.54 4459745.53,2341287.4 4459567.05,2340675.7 4459481.16,2339783.47 4459366.5,2338860.97 4459308.27,2337936.57 4459310.64,2337014.4 4459373.76,2336098.24 4459497.08,2335192.1 4459680.31,2334299.76 4459922.62,2333425.13 4460222.9,2323211.34 4474140.11,2323151.78 4475067.91,2323144.77 4475497.72,2323144.44 4475744.31)))